Merge pull request #5255 from vmarmol/cadvisor-dep

Godeps/Godeps.json

@@ -20,6 +20,11 @@
 			"Rev": "7dda39b2e7d5e265014674c5af696ba4186679e9"
 		},
 		{
+			"ImportPath": "code.google.com/p/go.exp/inotify",
+			"Comment": "null-75",
+			"Rev": "bd8df7009305d6ada223ea3c95b94c0f38bfa119"
+		},
+		{
 			"ImportPath": "code.google.com/p/go.net/spdy",
 			"Comment": "null-240",
 			"Rev": "937a34c9de13c766c814510f76bca091dee06028"
@@ -59,6 +64,11 @@
 			"Rev": "23142f6773a676cc2cae8dd0cb90b2ea761c853f"
 		},
 		{
+			"ImportPath": "github.com/coreos/go-systemd/dbus",
+			"Comment": "v2-27-g97e243d",
+			"Rev": "97e243d21a8e232e9d8af38ba2366dfcfceebeba"
+		},
+		{
 			"ImportPath": "github.com/cpuguy83/go-md2man/mangen",
 			"Comment": "v1.0.2-5-g2831f11",
 			"Rev": "2831f11f66ff4008f10e2cd7ed9a85e3d3fc2bed"
@@ -83,6 +93,11 @@
 			"Rev": "211513156dc1ace48e630b4bf4ea0fcfdc8d9abf"
 		},
 		{
+			"ImportPath": "github.com/docker/docker/pkg/mount",
+			"Comment": "v1.4.1-656-g2115131",
+			"Rev": "211513156dc1ace48e630b4bf4ea0fcfdc8d9abf"
+		},
+		{
 			"ImportPath": "github.com/docker/docker/pkg/pools",
 			"Comment": "v1.4.1-656-g2115131",
 			"Rev": "211513156dc1ace48e630b4bf4ea0fcfdc8d9abf"
@@ -93,6 +108,11 @@
 			"Rev": "211513156dc1ace48e630b4bf4ea0fcfdc8d9abf"
 		},
 		{
+			"ImportPath": "github.com/docker/docker/pkg/symlink",
+			"Comment": "v1.4.1-656-g2115131",
+			"Rev": "211513156dc1ace48e630b4bf4ea0fcfdc8d9abf"
+		},
+		{
 			"ImportPath": "github.com/docker/docker/pkg/system",
 			"Comment": "v1.4.1-656-g2115131",
 			"Rev": "211513156dc1ace48e630b4bf4ea0fcfdc8d9abf"
@@ -113,6 +133,11 @@
 			"Rev": "211513156dc1ace48e630b4bf4ea0fcfdc8d9abf"
 		},
 		{
+			"ImportPath": "github.com/docker/libcontainer",
+			"Comment": "v1.4.0-52-gd7dea0e",
+			"Rev": "d7dea0e925315bab640115053204c16718839b1e"
+		},
+		{
 			"ImportPath": "github.com/docker/spdystream",
 			"Rev": "e731c8f9f19ffd7e51a469a2de1580c1dfbb4fae"
 		},
@@ -138,6 +163,11 @@
 			"Rev": "588cb435e59ee8b6c2795482887755841ad67207"
 		},
 		{
+			"ImportPath": "github.com/godbus/dbus",
+			"Comment": "0-7-g939230d",
+			"Rev": "939230d2086a4f1870e04c52e0a376c25bae0ec4"
+		},
+		{
 			"ImportPath": "github.com/golang/glog",
 			"Rev": "44145f04b68cf362d9c4df2182967c2275eaefed"
 		},
@@ -151,13 +181,58 @@
 		},
 		{
 			"ImportPath": "github.com/google/cadvisor/client",
-			"Comment": "0.10.1-30-gb5e2f37",
-			"Rev": "b5e2f3788e4a39a0836c5490e6bf31832400c1f3"
+			"Comment": "0.10.1-36-g62a1788",
+			"Rev": "62a1788621f4adee2dbf08c26060ed7fb8c0297d"
+		},
+		{
+			"ImportPath": "github.com/google/cadvisor/container",
+			"Comment": "0.10.1-36-g62a1788",
+			"Rev": "62a1788621f4adee2dbf08c26060ed7fb8c0297d"
+		},
+		{
+			"ImportPath": "github.com/google/cadvisor/events",
+			"Comment": "0.10.1-36-g62a1788",
+			"Rev": "62a1788621f4adee2dbf08c26060ed7fb8c0297d"
+		},
+		{
+			"ImportPath": "github.com/google/cadvisor/fs",
+			"Comment": "0.10.1-36-g62a1788",
+			"Rev": "62a1788621f4adee2dbf08c26060ed7fb8c0297d"
 		},
 		{
 			"ImportPath": "github.com/google/cadvisor/info/v1",
-			"Comment": "0.10.1-30-gb5e2f37",
-			"Rev": "b5e2f3788e4a39a0836c5490e6bf31832400c1f3"
+			"Comment": "0.10.1-36-g62a1788",
+			"Rev": "62a1788621f4adee2dbf08c26060ed7fb8c0297d"
+		},
+		{
+			"ImportPath": "github.com/google/cadvisor/info/v2",
+			"Comment": "0.10.1-36-g62a1788",
+			"Rev": "62a1788621f4adee2dbf08c26060ed7fb8c0297d"
+		},
+		{
+			"ImportPath": "github.com/google/cadvisor/manager",
+			"Comment": "0.10.1-36-g62a1788",
+			"Rev": "62a1788621f4adee2dbf08c26060ed7fb8c0297d"
+		},
+		{
+			"ImportPath": "github.com/google/cadvisor/storage",
+			"Comment": "0.10.1-36-g62a1788",
+			"Rev": "62a1788621f4adee2dbf08c26060ed7fb8c0297d"
+		},
+		{
+			"ImportPath": "github.com/google/cadvisor/summary",
+			"Comment": "0.10.1-36-g62a1788",
+			"Rev": "62a1788621f4adee2dbf08c26060ed7fb8c0297d"
+		},
+		{
+			"ImportPath": "github.com/google/cadvisor/utils",
+			"Comment": "0.10.1-36-g62a1788",
+			"Rev": "62a1788621f4adee2dbf08c26060ed7fb8c0297d"
+		},
+		{
+			"ImportPath": "github.com/google/cadvisor/version",
+			"Comment": "0.10.1-36-g62a1788",
+			"Rev": "62a1788621f4adee2dbf08c26060ed7fb8c0297d"
 		},
 		{
 			"ImportPath": "github.com/google/gofuzz",

Godeps/_workspace/src/code.google.com/p/go.exp/inotify/inotify_linux.go

+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+/*
+Package inotify implements a wrapper for the Linux inotify system.
+
+Example:
+    watcher, err := inotify.NewWatcher()
+    if err != nil {
+        log.Fatal(err)
+    }
+    err = watcher.Watch("/tmp")
+    if err != nil {
+        log.Fatal(err)
+    }
+    for {
+        select {
+        case ev := <-watcher.Event:
+            log.Println("event:", ev)
+        case err := <-watcher.Error:
+            log.Println("error:", err)
+        }
+    }
+
+*/
+package inotify
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"strings"
+	"sync"
+	"syscall"
+	"unsafe"
+)
+
+type Event struct {
+	Mask   uint32 // Mask of events
+	Cookie uint32 // Unique cookie associating related events (for rename(2))
+	Name   string // File name (optional)
+}
+
+type watch struct {
+	wd    uint32 // Watch descriptor (as returned by the inotify_add_watch() syscall)
+	flags uint32 // inotify flags of this watch (see inotify(7) for the list of valid flags)
+}
+
+type Watcher struct {
+	mu       sync.Mutex
+	fd       int               // File descriptor (as returned by the inotify_init() syscall)
+	watches  map[string]*watch // Map of inotify watches (key: path)
+	paths    map[int]string    // Map of watched paths (key: watch descriptor)
+	Error    chan error        // Errors are sent on this channel
+	Event    chan *Event       // Events are returned on this channel
+	done     chan bool         // Channel for sending a "quit message" to the reader goroutine
+	isClosed bool              // Set to true when Close() is first called
+}
+
+// NewWatcher creates and returns a new inotify instance using inotify_init(2)
+func NewWatcher() (*Watcher, error) {
+	fd, errno := syscall.InotifyInit()
+	if fd == -1 {
+		return nil, os.NewSyscallError("inotify_init", errno)
+	}
+	w := &Watcher{
+		fd:      fd,
+		watches: make(map[string]*watch),
+		paths:   make(map[int]string),
+		Event:   make(chan *Event),
+		Error:   make(chan error),
+		done:    make(chan bool, 1),
+	}
+
+	go w.readEvents()
+	return w, nil
+}
+
+// Close closes an inotify watcher instance
+// It sends a message to the reader goroutine to quit and removes all watches
+// associated with the inotify instance
+func (w *Watcher) Close() error {
+	if w.isClosed {
+		return nil
+	}
+	w.isClosed = true
+
+	// Send "quit" message to the reader goroutine
+	w.done <- true
+	for path := range w.watches {
+		w.RemoveWatch(path)
+	}
+
+	return nil
+}
+
+// AddWatch adds path to the watched file set.
+// The flags are interpreted as described in inotify_add_watch(2).
+func (w *Watcher) AddWatch(path string, flags uint32) error {
+	if w.isClosed {
+		return errors.New("inotify instance already closed")
+	}
+
+	watchEntry, found := w.watches[path]
+	if found {
+		watchEntry.flags |= flags
+		flags |= syscall.IN_MASK_ADD
+	}
+
+	w.mu.Lock() // synchronize with readEvents goroutine
+
+	wd, err := syscall.InotifyAddWatch(w.fd, path, flags)
+	if err != nil {
+		w.mu.Unlock()
+		return &os.PathError{
+			Op:   "inotify_add_watch",
+			Path: path,
+			Err:  err,
+		}
+	}
+
+	if !found {
+		w.watches[path] = &watch{wd: uint32(wd), flags: flags}
+		w.paths[wd] = path
+	}
+	w.mu.Unlock()
+	return nil
+}
+
+// Watch adds path to the watched file set, watching all events.
+func (w *Watcher) Watch(path string) error {
+	return w.AddWatch(path, IN_ALL_EVENTS)
+}
+
+// RemoveWatch removes path from the watched file set.
+func (w *Watcher) RemoveWatch(path string) error {
+	watch, ok := w.watches[path]
+	if !ok {
+		return errors.New(fmt.Sprintf("can't remove non-existent inotify watch for: %s", path))
+	}
+	success, errno := syscall.InotifyRmWatch(w.fd, watch.wd)
+	if success == -1 {
+		return os.NewSyscallError("inotify_rm_watch", errno)
+	}
+	delete(w.watches, path)
+	return nil
+}
+
+// readEvents reads from the inotify file descriptor, converts the
+// received events into Event objects and sends them via the Event channel
+func (w *Watcher) readEvents() {
+	var buf [syscall.SizeofInotifyEvent * 4096]byte
+
+	for {
+		n, err := syscall.Read(w.fd, buf[:])
+		// See if there is a message on the "done" channel
+		var done bool
+		select {
+		case done = <-w.done:
+		default:
+		}
+
+		// If EOF or a "done" message is received
+		if n == 0 || done {
+			// The syscall.Close can be slow.  Close
+			// w.Event first.
+			close(w.Event)
+			err := syscall.Close(w.fd)
+			if err != nil {
+				w.Error <- os.NewSyscallError("close", err)
+			}
+			close(w.Error)
+			return
+		}
+		if n < 0 {
+			w.Error <- os.NewSyscallError("read", err)
+			continue
+		}
+		if n < syscall.SizeofInotifyEvent {
+			w.Error <- errors.New("inotify: short read in readEvents()")
+			continue
+		}
+
+		var offset uint32 = 0
+		// We don't know how many events we just read into the buffer
+		// While the offset points to at least one whole event...
+		for offset <= uint32(n-syscall.SizeofInotifyEvent) {
+			// Point "raw" to the event in the buffer
+			raw := (*syscall.InotifyEvent)(unsafe.Pointer(&buf[offset]))
+			event := new(Event)
+			event.Mask = uint32(raw.Mask)
+			event.Cookie = uint32(raw.Cookie)
+			nameLen := uint32(raw.Len)
+			// If the event happened to the watched directory or the watched file, the kernel
+			// doesn't append the filename to the event, but we would like to always fill the
+			// the "Name" field with a valid filename. We retrieve the path of the watch from
+			// the "paths" map.
+			w.mu.Lock()
+			event.Name = w.paths[int(raw.Wd)]
+			w.mu.Unlock()
+			if nameLen > 0 {
+				// Point "bytes" at the first byte of the filename
+				bytes := (*[syscall.PathMax]byte)(unsafe.Pointer(&buf[offset+syscall.SizeofInotifyEvent]))
+				// The filename is padded with NUL bytes. TrimRight() gets rid of those.
+				event.Name += "/" + strings.TrimRight(string(bytes[0:nameLen]), "\000")
+			}
+			// Send the event on the events channel
+			w.Event <- event
+
+			// Move to the next event in the buffer
+			offset += syscall.SizeofInotifyEvent + nameLen
+		}
+	}
+}
+
+// String formats the event e in the form
+// "filename: 0xEventMask = IN_ACCESS|IN_ATTRIB_|..."
+func (e *Event) String() string {
+	var events string = ""
+
+	m := e.Mask
+	for _, b := range eventBits {
+		if m&b.Value != 0 {
+			m &^= b.Value
+			events += "|" + b.Name
+		}
+	}
+
+	if m != 0 {
+		events += fmt.Sprintf("|%#x", m)
+	}
+	if len(events) > 0 {
+		events = " == " + events[1:]
+	}
+
+	return fmt.Sprintf("%q: %#x%s", e.Name, e.Mask, events)
+}
+
+const (
+	// Options for inotify_init() are not exported
+	// IN_CLOEXEC    uint32 = syscall.IN_CLOEXEC
+	// IN_NONBLOCK   uint32 = syscall.IN_NONBLOCK
+
+	// Options for AddWatch
+	IN_DONT_FOLLOW uint32 = syscall.IN_DONT_FOLLOW
+	IN_ONESHOT     uint32 = syscall.IN_ONESHOT
+	IN_ONLYDIR     uint32 = syscall.IN_ONLYDIR
+
+	// The "IN_MASK_ADD" option is not exported, as AddWatch
+	// adds it automatically, if there is already a watch for the given path
+	// IN_MASK_ADD      uint32 = syscall.IN_MASK_ADD
+
+	// Events
+	IN_ACCESS        uint32 = syscall.IN_ACCESS
+	IN_ALL_EVENTS    uint32 = syscall.IN_ALL_EVENTS
+	IN_ATTRIB        uint32 = syscall.IN_ATTRIB
+	IN_CLOSE         uint32 = syscall.IN_CLOSE
+	IN_CLOSE_NOWRITE uint32 = syscall.IN_CLOSE_NOWRITE
+	IN_CLOSE_WRITE   uint32 = syscall.IN_CLOSE_WRITE
+	IN_CREATE        uint32 = syscall.IN_CREATE
+	IN_DELETE        uint32 = syscall.IN_DELETE
+	IN_DELETE_SELF   uint32 = syscall.IN_DELETE_SELF
+	IN_MODIFY        uint32 = syscall.IN_MODIFY
+	IN_MOVE          uint32 = syscall.IN_MOVE
+	IN_MOVED_FROM    uint32 = syscall.IN_MOVED_FROM
+	IN_MOVED_TO      uint32 = syscall.IN_MOVED_TO
+	IN_MOVE_SELF     uint32 = syscall.IN_MOVE_SELF
+	IN_OPEN          uint32 = syscall.IN_OPEN
+
+	// Special events
+	IN_ISDIR      uint32 = syscall.IN_ISDIR
+	IN_IGNORED    uint32 = syscall.IN_IGNORED
+	IN_Q_OVERFLOW uint32 = syscall.IN_Q_OVERFLOW
+	IN_UNMOUNT    uint32 = syscall.IN_UNMOUNT
+)
+
+var eventBits = []struct {
+	Value uint32
+	Name  string
+}{
+	{IN_ACCESS, "IN_ACCESS"},
+	{IN_ATTRIB, "IN_ATTRIB"},
+	{IN_CLOSE, "IN_CLOSE"},
+	{IN_CLOSE_NOWRITE, "IN_CLOSE_NOWRITE"},
+	{IN_CLOSE_WRITE, "IN_CLOSE_WRITE"},
+	{IN_CREATE, "IN_CREATE"},
+	{IN_DELETE, "IN_DELETE"},
+	{IN_DELETE_SELF, "IN_DELETE_SELF"},
+	{IN_MODIFY, "IN_MODIFY"},
+	{IN_MOVE, "IN_MOVE"},
+	{IN_MOVED_FROM, "IN_MOVED_FROM"},
+	{IN_MOVED_TO, "IN_MOVED_TO"},
+	{IN_MOVE_SELF, "IN_MOVE_SELF"},
+	{IN_OPEN, "IN_OPEN"},
+	{IN_ISDIR, "IN_ISDIR"},
+	{IN_IGNORED, "IN_IGNORED"},
+	{IN_Q_OVERFLOW, "IN_Q_OVERFLOW"},
+	{IN_UNMOUNT, "IN_UNMOUNT"},
+}

Godeps/_workspace/src/code.google.com/p/go.exp/inotify/inotify_linux_test.go

+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build linux
+
+package inotify
+
+import (
+	"io/ioutil"
+	"os"
+	"sync/atomic"
+	"testing"
+	"time"
+)
+
+func TestInotifyEvents(t *testing.T) {
+	// Create an inotify watcher instance and initialize it
+	watcher, err := NewWatcher()
+	if err != nil {
+		t.Fatalf("NewWatcher failed: %s", err)
+	}
+
+	dir, err := ioutil.TempDir("", "inotify")
+	if err != nil {
+		t.Fatalf("TempDir failed: %s", err)
+	}
+	defer os.RemoveAll(dir)
+
+	// Add a watch for "_test"
+	err = watcher.Watch(dir)
+	if err != nil {
+		t.Fatalf("Watch failed: %s", err)
+	}
+
+	// Receive errors on the error channel on a separate goroutine
+	go func() {
+		for err := range watcher.Error {
+			t.Fatalf("error received: %s", err)
+		}
+	}()
+
+	testFile := dir + "/TestInotifyEvents.testfile"
+
+	// Receive events on the event channel on a separate goroutine
+	eventstream := watcher.Event
+	var eventsReceived int32 = 0
+	done := make(chan bool)
+	go func() {
+		for event := range eventstream {
+			// Only count relevant events
+			if event.Name == testFile {
+				atomic.AddInt32(&eventsReceived, 1)
+				t.Logf("event received: %s", event)
+			} else {
+				t.Logf("unexpected event received: %s", event)
+			}
+		}
+		done <- true
+	}()
+
+	// Create a file
+	// This should add at least one event to the inotify event queue
+	_, err = os.OpenFile(testFile, os.O_WRONLY|os.O_CREATE, 0666)
+	if err != nil {
+		t.Fatalf("creating test file: %s", err)
+	}
+
+	// We expect this event to be received almost immediately, but let's wait 1 s to be sure
+	time.Sleep(1 * time.Second)
+	if atomic.AddInt32(&eventsReceived, 0) == 0 {
+		t.Fatal("inotify event hasn't been received after 1 second")
+	}
+
+	// Try closing the inotify instance
+	t.Log("calling Close()")
+	watcher.Close()
+	t.Log("waiting for the event channel to become closed...")
+	select {
+	case <-done:
+		t.Log("event channel closed")
+	case <-time.After(1 * time.Second):
+		t.Fatal("event stream was not closed after 1 second")
+	}
+}
+
+func TestInotifyClose(t *testing.T) {
+	watcher, _ := NewWatcher()
+	watcher.Close()
+
+	done := make(chan bool)
+	go func() {
+		watcher.Close()
+		done <- true
+	}()
+
+	select {
+	case <-done:
+	case <-time.After(50 * time.Millisecond):
+		t.Fatal("double Close() test failed: second Close() call didn't return")
+	}
+
+	err := watcher.Watch(os.TempDir())
+	if err == nil {
+		t.Fatal("expected error on Watch() after Close(), got nil")
+	}
+}

Godeps/_workspace/src/github.com/coreos/go-systemd/dbus/dbus.go

+/*
+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.
+*/
+
+// Integration with the systemd D-Bus API.  See http://www.freedesktop.org/wiki/Software/systemd/dbus/
+package dbus
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+	"sync"
+
+	"github.com/godbus/dbus"
+)
+
+const (
+	alpha        = `abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ`
+	num          = `0123456789`
+	alphanum     = alpha + num
+	signalBuffer = 100
+)
+
+// needsEscape checks whether a byte in a potential dbus ObjectPath needs to be escaped
+func needsEscape(i int, b byte) bool {
+	// Escape everything that is not a-z-A-Z-0-9
+	// Also escape 0-9 if it's the first character
+	return strings.IndexByte(alphanum, b) == -1 ||
+		(i == 0 && strings.IndexByte(num, b) != -1)
+}
+
+// PathBusEscape sanitizes a constituent string of a dbus ObjectPath using the
+// rules that systemd uses for serializing special characters.
+func PathBusEscape(path string) string {
+	// Special case the empty string
+	if len(path) == 0 {
+		return "_"
+	}
+	n := []byte{}
+	for i := 0; i < len(path); i++ {
+		c := path[i]
+		if needsEscape(i, c) {
+			e := fmt.Sprintf("_%x", c)
+			n = append(n, []byte(e)...)
+		} else {
+			n = append(n, c)
+		}
+	}
+	return string(n)
+}
+
+// Conn is a connection to systemd's dbus endpoint.
+type Conn struct {
+	sysconn     *dbus.Conn
+	sysobj      *dbus.Object
+	jobListener struct {
+		jobs map[dbus.ObjectPath]chan string
+		sync.Mutex
+	}
+	subscriber struct {
+		updateCh chan<- *SubStateUpdate
+		errCh    chan<- error
+		sync.Mutex
+		ignore      map[dbus.ObjectPath]int64
+		cleanIgnore int64
+	}
+	dispatch map[string]func(dbus.Signal)
+}
+
+// New() establishes a connection to the system bus and authenticates.
+func New() (*Conn, error) {
+	c := new(Conn)
+
+	if err := c.initConnection(); err != nil {
+		return nil, err
+	}
+
+	c.initJobs()
+	return c, nil
+}
+
+func (c *Conn) initConnection() error {
+	var err error
+	c.sysconn, err = dbus.SystemBusPrivate()
+	if err != nil {
+		return err
+	}
+
+	// Only use EXTERNAL method, and hardcode the uid (not username)
+	// to avoid a username lookup (which requires a dynamically linked
+	// libc)
+	methods := []dbus.Auth{dbus.AuthExternal(strconv.Itoa(os.Getuid()))}
+
+	err = c.sysconn.Auth(methods)
+	if err != nil {
+		c.sysconn.Close()
+		return err
+	}
+
+	err = c.sysconn.Hello()
+	if err != nil {
+		c.sysconn.Close()
+		return err
+	}
+
+	c.sysobj = c.sysconn.Object("org.freedesktop.systemd1", dbus.ObjectPath("/org/freedesktop/systemd1"))
+
+	// Setup the listeners on jobs so that we can get completions
+	c.sysconn.BusObject().Call("org.freedesktop.DBus.AddMatch", 0,
+		"type='signal', interface='org.freedesktop.systemd1.Manager', member='JobRemoved'")
+	c.initSubscription()
+	c.initDispatch()
+
+	return nil
+}

Godeps/_workspace/src/github.com/coreos/go-systemd/dbus/dbus_test.go

+/*
+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 dbus
+
+import (
+	"testing"
+)
+
+func TestNeedsEscape(t *testing.T) {
+	// Anything not 0-9a-zA-Z should always be escaped
+	for want, vals := range map[bool][]byte{
+		false: []byte{'a', 'b', 'z', 'A', 'Q', '1', '4', '9'},
+		true:  []byte{'#', '%', '$', '!', '.', '_', '-', '%', '\\'},
+	} {
+		for i := 1; i < 10; i++ {
+			for _, b := range vals {
+				got := needsEscape(i, b)
+				if got != want {
+					t.Errorf("needsEscape(%d, %c) returned %t, want %t", i, b, got, want)
+				}
+			}
+		}
+	}
+
+	// 0-9 in position 0 should be escaped
+	for want, vals := range map[bool][]byte{
+		false: []byte{'A', 'a', 'e', 'x', 'Q', 'Z'},
+		true:  []byte{'0', '4', '5', '9'},
+	} {
+		for _, b := range vals {
+			got := needsEscape(0, b)
+			if got != want {
+				t.Errorf("needsEscape(0, %c) returned %t, want %t", b, got, want)
+			}
+		}
+	}
+
+}
+
+func TestPathBusEscape(t *testing.T) {
+	for in, want := range map[string]string{
+		"":                   "_",
+		"foo.service":        "foo_2eservice",
+		"foobar":             "foobar",
+		"woof@woof.service":  "woof_40woof_2eservice",
+		"0123456":            "_30123456",
+		"account_db.service": "account_5fdb_2eservice",
+		"got-dashes":         "got_2ddashes",
+	} {
+		got := PathBusEscape(in)
+		if got != want {
+			t.Errorf("bad result for PathBusEscape(%s): got %q, want %q", in, got, want)
+		}
+	}
+
+}
+
+// TestNew ensures that New() works without errors.
+func TestNew(t *testing.T) {
+	_, err := New()
+
+	if err != nil {
+		t.Fatal(err)
+	}
+}

Godeps/_workspace/src/github.com/coreos/go-systemd/dbus/methods_test.go

+/*
+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 dbus
+
+import (
+	"fmt"
+	"math/rand"
+	"os"
+	"path/filepath"
+	"reflect"
+	"testing"
+
+	"github.com/godbus/dbus"
+)
+
+func setupConn(t *testing.T) *Conn {
+	conn, err := New()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	return conn
+}
+
+func findFixture(target string, t *testing.T) string {
+	abs, err := filepath.Abs("../fixtures/" + target)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return abs
+}
+
+func setupUnit(target string, conn *Conn, t *testing.T) {
+	// Blindly stop the unit in case it is running
+	conn.StopUnit(target, "replace")
+
+	// Blindly remove the symlink in case it exists
+	targetRun := filepath.Join("/run/systemd/system/", target)
+	os.Remove(targetRun)
+}
+
+func linkUnit(target string, conn *Conn, t *testing.T) {
+	abs := findFixture(target, t)
+	fixture := []string{abs}
+
+	changes, err := conn.LinkUnitFiles(fixture, true, true)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if len(changes) < 1 {
+		t.Fatalf("Expected one change, got %v", changes)
+	}
+
+	runPath := filepath.Join("/run/systemd/system/", target)
+	if changes[0].Filename != runPath {
+		t.Fatal("Unexpected target filename")
+	}
+}
+
+// Ensure that basic unit starting and stopping works.
+func TestStartStopUnit(t *testing.T) {
+	target := "start-stop.service"
+	conn := setupConn(t)
+
+	setupUnit(target, conn, t)
+	linkUnit(target, conn, t)
+
+	// 2. Start the unit
+	job, err := conn.StartUnit(target, "replace")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if job != "done" {
+		t.Fatal("Job is not done:", job)
+	}
+
+	units, err := conn.ListUnits()
+
+	var unit *UnitStatus
+	for _, u := range units {
+		if u.Name == target {
+			unit = &u
+		}
+	}
+
+	if unit == nil {
+		t.Fatalf("Test unit not found in list")
+	}
+
+	if unit.ActiveState != "active" {
+		t.Fatalf("Test unit not active")
+	}
+
+	// 3. Stop the unit
+	job, err = conn.StopUnit(target, "replace")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	units, err = conn.ListUnits()
+
+	unit = nil
+	for _, u := range units {
+		if u.Name == target {
+			unit = &u
+		}
+	}
+
+	if unit != nil {
+		t.Fatalf("Test unit found in list, should be stopped")
+	}
+}
+
+// Enables a unit and then immediately tears it down
+func TestEnableDisableUnit(t *testing.T) {
+	target := "enable-disable.service"
+	conn := setupConn(t)
+
+	setupUnit(target, conn, t)
+	abs := findFixture(target, t)
+	runPath := filepath.Join("/run/systemd/system/", target)
+
+	// 1. Enable the unit
+	install, changes, err := conn.EnableUnitFiles([]string{abs}, true, true)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if install != false {
+		t.Fatal("Install was true")
+	}
+
+	if len(changes) < 1 {
+		t.Fatalf("Expected one change, got %v", changes)
+	}
+
+	if changes[0].Filename != runPath {
+		t.Fatal("Unexpected target filename")
+	}
+
+	// 2. Disable the unit
+	dChanges, err := conn.DisableUnitFiles([]string{abs}, true)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if len(dChanges) != 1 {
+		t.Fatalf("Changes should include the path, %v", dChanges)
+	}
+	if dChanges[0].Filename != runPath {
+		t.Fatalf("Change should include correct filename, %+v", dChanges[0])
+	}
+	if dChanges[0].Destination != "" {
+		t.Fatalf("Change destination should be empty, %+v", dChanges[0])
+	}
+}
+
+// TestGetUnitProperties reads the `-.mount` which should exist on all systemd
+// systems and ensures that one of its properties is valid.
+func TestGetUnitProperties(t *testing.T) {
+	conn := setupConn(t)
+
+	unit := "-.mount"
+
+	info, err := conn.GetUnitProperties(unit)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	names := info["Wants"].([]string)
+
+	if len(names) < 1 {
+		t.Fatal("/ is unwanted")
+	}
+
+	if names[0] != "system.slice" {
+		t.Fatal("unexpected wants for /")
+	}
+
+	prop, err := conn.GetUnitProperty(unit, "Wants")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if prop.Name != "Wants" {
+		t.Fatal("unexpected property name")
+	}
+
+	val := prop.Value.Value().([]string)
+	if !reflect.DeepEqual(val, names) {
+		t.Fatal("unexpected property value")
+	}
+}
+
+// TestGetUnitPropertiesRejectsInvalidName attempts to get the properties for a
+// unit with an invalid name. This test should be run with --test.timeout set,
+// as a fail will manifest as GetUnitProperties hanging indefinitely.
+func TestGetUnitPropertiesRejectsInvalidName(t *testing.T) {
+	conn := setupConn(t)
+
+	unit := "//invalid#$^/"
+
+	_, err := conn.GetUnitProperties(unit)
+	if err == nil {
+		t.Fatal("Expected an error, got nil")
+	}
+
+	_, err = conn.GetUnitProperty(unit, "Wants")
+	if err == nil {
+		t.Fatal("Expected an error, got nil")
+	}
+}
+
+// TestSetUnitProperties changes a cgroup setting on the `tmp.mount`
+// which should exist on all systemd systems and ensures that the
+// property was set.
+func TestSetUnitProperties(t *testing.T) {
+	conn := setupConn(t)
+
+	unit := "tmp.mount"
+
+	if err := conn.SetUnitProperties(unit, true, Property{"CPUShares", dbus.MakeVariant(uint64(1023))}); err != nil {
+		t.Fatal(err)
+	}
+
+	info, err := conn.GetUnitTypeProperties(unit, "Mount")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	value := info["CPUShares"].(uint64)
+	if value != 1023 {
+		t.Fatal("CPUShares of unit is not 1023:", value)
+	}
+}
+
+// Ensure that basic transient unit starting and stopping works.
+func TestStartStopTransientUnit(t *testing.T) {
+	conn := setupConn(t)
+
+	props := []Property{
+		PropExecStart([]string{"/bin/sleep", "400"}, false),
+	}
+	target := fmt.Sprintf("testing-transient-%d.service", rand.Int())
+
+	// Start the unit
+	job, err := conn.StartTransientUnit(target, "replace", props...)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if job != "done" {
+		t.Fatal("Job is not done:", job)
+	}
+
+	units, err := conn.ListUnits()
+
+	var unit *UnitStatus
+	for _, u := range units {
+		if u.Name == target {
+			unit = &u
+		}
+	}
+
+	if unit == nil {
+		t.Fatalf("Test unit not found in list")
+	}
+
+	if unit.ActiveState != "active" {
+		t.Fatalf("Test unit not active")
+	}
+
+	// 3. Stop the unit
+	job, err = conn.StopUnit(target, "replace")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	units, err = conn.ListUnits()
+
+	unit = nil
+	for _, u := range units {
+		if u.Name == target {
+			unit = &u
+		}
+	}
+
+	if unit != nil {
+		t.Fatalf("Test unit found in list, should be stopped")
+	}
+}
+
+func TestConnJobListener(t *testing.T) {
+	target := "start-stop.service"
+	conn := setupConn(t)
+
+	setupUnit(target, conn, t)
+	linkUnit(target, conn, t)
+
+	jobSize := len(conn.jobListener.jobs)
+
+	_, err := conn.StartUnit(target, "replace")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = conn.StopUnit(target, "replace")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	currentJobSize := len(conn.jobListener.jobs)
+	if jobSize != currentJobSize {
+		t.Fatal("JobListener jobs leaked")
+	}
+}

Godeps/_workspace/src/github.com/coreos/go-systemd/dbus/properties.go

+/*
+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 dbus
+
+import (
+	"github.com/godbus/dbus"
+)
+
+// From the systemd docs:
+//
+// The properties array of StartTransientUnit() may take many of the settings
+// that may also be configured in unit files. Not all parameters are currently
+// accepted though, but we plan to cover more properties with future release.
+// Currently you may set the Description, Slice and all dependency types of
+// units, as well as RemainAfterExit, ExecStart for service units,
+// TimeoutStopUSec and PIDs for scope units, and CPUAccounting, CPUShares,
+// BlockIOAccounting, BlockIOWeight, BlockIOReadBandwidth,
+// BlockIOWriteBandwidth, BlockIODeviceWeight, MemoryAccounting, MemoryLimit,
+// DevicePolicy, DeviceAllow for services/scopes/slices. These fields map
+// directly to their counterparts in unit files and as normal D-Bus object
+// properties. The exception here is the PIDs field of scope units which is
+// used for construction of the scope only and specifies the initial PIDs to
+// add to the scope object.
+
+type Property struct {
+	Name  string
+	Value dbus.Variant
+}
+
+type PropertyCollection struct {
+	Name       string
+	Properties []Property
+}
+
+type execStart struct {
+	Path             string   // the binary path to execute
+	Args             []string // an array with all arguments to pass to the executed command, starting with argument 0
+	UncleanIsFailure bool     // a boolean whether it should be considered a failure if the process exits uncleanly
+}
+
+// PropExecStart sets the ExecStart service property.  The first argument is a
+// slice with the binary path to execute followed by the arguments to pass to
+// the executed command. See
+// http://www.freedesktop.org/software/systemd/man/systemd.service.html#ExecStart=
+func PropExecStart(command []string, uncleanIsFailure bool) Property {
+	execStarts := []execStart{
+		execStart{
+			Path:             command[0],
+			Args:             command,
+			UncleanIsFailure: uncleanIsFailure,
+		},
+	}
+
+	return Property{
+		Name:  "ExecStart",
+		Value: dbus.MakeVariant(execStarts),
+	}
+}
+
+// PropRemainAfterExit sets the RemainAfterExit service property. See
+// http://www.freedesktop.org/software/systemd/man/systemd.service.html#RemainAfterExit=
+func PropRemainAfterExit(b bool) Property {
+	return Property{
+		Name:  "RemainAfterExit",
+		Value: dbus.MakeVariant(b),
+	}
+}
+
+// PropDescription sets the Description unit property. See
+// http://www.freedesktop.org/software/systemd/man/systemd.unit#Description=
+func PropDescription(desc string) Property {
+	return Property{
+		Name:  "Description",
+		Value: dbus.MakeVariant(desc),
+	}
+}
+
+func propDependency(name string, units []string) Property {
+	return Property{
+		Name:  name,
+		Value: dbus.MakeVariant(units),
+	}
+}
+
+// PropRequires sets the Requires unit property.  See
+// http://www.freedesktop.org/software/systemd/man/systemd.unit.html#Requires=
+func PropRequires(units ...string) Property {
+	return propDependency("Requires", units)
+}
+
+// PropRequiresOverridable sets the RequiresOverridable unit property.  See
+// http://www.freedesktop.org/software/systemd/man/systemd.unit.html#RequiresOverridable=
+func PropRequiresOverridable(units ...string) Property {
+	return propDependency("RequiresOverridable", units)
+}
+
+// PropRequisite sets the Requisite unit property.  See
+// http://www.freedesktop.org/software/systemd/man/systemd.unit.html#Requisite=
+func PropRequisite(units ...string) Property {
+	return propDependency("Requisite", units)
+}
+
+// PropRequisiteOverridable sets the RequisiteOverridable unit property.  See
+// http://www.freedesktop.org/software/systemd/man/systemd.unit.html#RequisiteOverridable=
+func PropRequisiteOverridable(units ...string) Property {
+	return propDependency("RequisiteOverridable", units)
+}
+
+// PropWants sets the Wants unit property.  See
+// http://www.freedesktop.org/software/systemd/man/systemd.unit.html#Wants=
+func PropWants(units ...string) Property {
+	return propDependency("Wants", units)
+}
+
+// PropBindsTo sets the BindsTo unit property.  See
+// http://www.freedesktop.org/software/systemd/man/systemd.unit.html#BindsTo=
+func PropBindsTo(units ...string) Property {
+	return propDependency("BindsTo", units)
+}
+
+// PropRequiredBy sets the RequiredBy unit property.  See
+// http://www.freedesktop.org/software/systemd/man/systemd.unit.html#RequiredBy=
+func PropRequiredBy(units ...string) Property {
+	return propDependency("RequiredBy", units)
+}
+
+// PropRequiredByOverridable sets the RequiredByOverridable unit property.  See
+// http://www.freedesktop.org/software/systemd/man/systemd.unit.html#RequiredByOverridable=
+func PropRequiredByOverridable(units ...string) Property {
+	return propDependency("RequiredByOverridable", units)
+}
+
+// PropWantedBy sets the WantedBy unit property.  See
+// http://www.freedesktop.org/software/systemd/man/systemd.unit.html#WantedBy=
+func PropWantedBy(units ...string) Property {
+	return propDependency("WantedBy", units)
+}
+
+// PropBoundBy sets the BoundBy unit property.  See
+// http://www.freedesktop.org/software/systemd/main/systemd.unit.html#BoundBy=
+func PropBoundBy(units ...string) Property {
+	return propDependency("BoundBy", units)
+}
+
+// PropConflicts sets the Conflicts unit property.  See
+// http://www.freedesktop.org/software/systemd/man/systemd.unit.html#Conflicts=
+func PropConflicts(units ...string) Property {
+	return propDependency("Conflicts", units)
+}
+
+// PropConflictedBy sets the ConflictedBy unit property.  See
+// http://www.freedesktop.org/software/systemd/man/systemd.unit.html#ConflictedBy=
+func PropConflictedBy(units ...string) Property {
+	return propDependency("ConflictedBy", units)
+}
+
+// PropBefore sets the Before unit property.  See
+// http://www.freedesktop.org/software/systemd/man/systemd.unit.html#Before=
+func PropBefore(units ...string) Property {
+	return propDependency("Before", units)
+}
+
+// PropAfter sets the After unit property.  See
+// http://www.freedesktop.org/software/systemd/man/systemd.unit.html#After=
+func PropAfter(units ...string) Property {
+	return propDependency("After", units)
+}
+
+// PropOnFailure sets the OnFailure unit property.  See
+// http://www.freedesktop.org/software/systemd/man/systemd.unit.html#OnFailure=
+func PropOnFailure(units ...string) Property {
+	return propDependency("OnFailure", units)
+}
+
+// PropTriggers sets the Triggers unit property.  See
+// http://www.freedesktop.org/software/systemd/man/systemd.unit.html#Triggers=
+func PropTriggers(units ...string) Property {
+	return propDependency("Triggers", units)
+}
+
+// PropTriggeredBy sets the TriggeredBy unit property.  See
+// http://www.freedesktop.org/software/systemd/man/systemd.unit.html#TriggeredBy=
+func PropTriggeredBy(units ...string) Property {
+	return propDependency("TriggeredBy", units)
+}
+
+// PropPropagatesReloadTo sets the PropagatesReloadTo unit property.  See
+// http://www.freedesktop.org/software/systemd/man/systemd.unit.html#PropagatesReloadTo=
+func PropPropagatesReloadTo(units ...string) Property {
+	return propDependency("PropagatesReloadTo", units)
+}
+
+// PropRequiresMountsFor sets the RequiresMountsFor unit property.  See
+// http://www.freedesktop.org/software/systemd/man/systemd.unit.html#RequiresMountsFor=
+func PropRequiresMountsFor(units ...string) Property {
+	return propDependency("RequiresMountsFor", units)
+}
+
+// PropSlice sets the Slice unit property.  See
+// http://www.freedesktop.org/software/systemd/man/systemd.resource-control.html#Slice=
+func PropSlice(slice string) Property {
+	return Property{
+		Name:  "Slice",
+		Value: dbus.MakeVariant(slice),
+	}
+}

Godeps/_workspace/src/github.com/coreos/go-systemd/dbus/set.go

+package dbus
+
+type set struct {
+	data map[string]bool
+}
+
+func (s *set) Add(value string) {
+	s.data[value] = true
+}
+
+func (s *set) Remove(value string) {
+	delete(s.data, value)
+}
+
+func (s *set) Contains(value string) (exists bool) {
+	_, exists = s.data[value]
+	return
+}
+
+func (s *set) Length() (int) {
+	return len(s.data)
+}
+
+func (s *set) Values() (values []string) {
+	 for val, _ := range s.data {
+		values = append(values, val)
+	 }
+	 return
+}
+
+func newSet() (*set) {
+	return &set{make(map[string] bool)}
+}

Godeps/_workspace/src/github.com/coreos/go-systemd/dbus/set_test.go

+package dbus
+
+import (
+	"testing"
+)
+
+// TestBasicSetActions asserts that Add & Remove behavior is correct
+func TestBasicSetActions(t *testing.T) {
+	s := newSet()
+
+	if s.Contains("foo") {
+		t.Fatal("set should not contain 'foo'")
+	}
+
+	s.Add("foo")
+
+	if !s.Contains("foo") {
+		t.Fatal("set should contain 'foo'")
+	}
+
+	v := s.Values()
+	if len(v) != 1 {
+		t.Fatal("set.Values did not report correct number of values")
+	}
+	if v[0] != "foo" {
+		t.Fatal("set.Values did not report value")
+	}
+
+	s.Remove("foo")
+
+	if s.Contains("foo") {
+		t.Fatal("set should not contain 'foo'")
+	}
+
+	v = s.Values()
+	if len(v) != 0 {
+		t.Fatal("set.Values did not report correct number of values")
+	}
+}

Godeps/_workspace/src/github.com/coreos/go-systemd/dbus/subscription.go

+/*
+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 dbus
+
+import (
+	"errors"
+	"time"
+
+	"github.com/godbus/dbus"
+)
+
+const (
+	cleanIgnoreInterval = int64(10 * time.Second)
+	ignoreInterval      = int64(30 * time.Millisecond)
+)
+
+// Subscribe sets up this connection to subscribe to all systemd dbus events.
+// This is required before calling SubscribeUnits. When the connection closes
+// systemd will automatically stop sending signals so there is no need to
+// explicitly call Unsubscribe().
+func (c *Conn) Subscribe() error {
+	c.sysconn.BusObject().Call("org.freedesktop.DBus.AddMatch", 0,
+		"type='signal',interface='org.freedesktop.systemd1.Manager',member='UnitNew'")
+	c.sysconn.BusObject().Call("org.freedesktop.DBus.AddMatch", 0,
+		"type='signal',interface='org.freedesktop.DBus.Properties',member='PropertiesChanged'")
+
+	err := c.sysobj.Call("org.freedesktop.systemd1.Manager.Subscribe", 0).Store()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// Unsubscribe this connection from systemd dbus events.
+func (c *Conn) Unsubscribe() error {
+	err := c.sysobj.Call("org.freedesktop.systemd1.Manager.Unsubscribe", 0).Store()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (c *Conn) initSubscription() {
+	c.subscriber.ignore = make(map[dbus.ObjectPath]int64)
+}
+
+func (c *Conn) initDispatch() {
+	ch := make(chan *dbus.Signal, signalBuffer)
+
+	c.sysconn.Signal(ch)
+
+	go func() {
+		for {
+			signal, ok := <-ch
+			if !ok {
+				return
+			}
+
+			switch signal.Name {
+			case "org.freedesktop.systemd1.Manager.JobRemoved":
+				c.jobComplete(signal)
+
+				unitName := signal.Body[2].(string)
+				var unitPath dbus.ObjectPath
+				c.sysobj.Call("org.freedesktop.systemd1.Manager.GetUnit", 0, unitName).Store(&unitPath)
+				if unitPath != dbus.ObjectPath("") {
+					c.sendSubStateUpdate(unitPath)
+				}
+			case "org.freedesktop.systemd1.Manager.UnitNew":
+				c.sendSubStateUpdate(signal.Body[1].(dbus.ObjectPath))
+			case "org.freedesktop.DBus.Properties.PropertiesChanged":
+				if signal.Body[0].(string) == "org.freedesktop.systemd1.Unit" {
+					// we only care about SubState updates, which are a Unit property
+					c.sendSubStateUpdate(signal.Path)
+				}
+			}
+		}
+	}()
+}
+
+// Returns two unbuffered channels which will receive all changed units every
+// interval.  Deleted units are sent as nil.
+func (c *Conn) SubscribeUnits(interval time.Duration) (<-chan map[string]*UnitStatus, <-chan error) {
+	return c.SubscribeUnitsCustom(interval, 0, func(u1, u2 *UnitStatus) bool { return *u1 != *u2 }, nil)
+}
+
+// SubscribeUnitsCustom is like SubscribeUnits but lets you specify the buffer
+// size of the channels, the comparison function for detecting changes and a filter
+// function for cutting down on the noise that your channel receives.
+func (c *Conn) SubscribeUnitsCustom(interval time.Duration, buffer int, isChanged func(*UnitStatus, *UnitStatus) bool, filterUnit func (string) bool) (<-chan map[string]*UnitStatus, <-chan error) {
+	old := make(map[string]*UnitStatus)
+	statusChan := make(chan map[string]*UnitStatus, buffer)
+	errChan := make(chan error, buffer)
+
+	go func() {
+		for {
+			timerChan := time.After(interval)
+
+			units, err := c.ListUnits()
+			if err == nil {
+				cur := make(map[string]*UnitStatus)
+				for i := range units {
+					if filterUnit != nil && filterUnit(units[i].Name) {
+						continue
+					}
+					cur[units[i].Name] = &units[i]
+				}
+
+				// add all new or changed units
+				changed := make(map[string]*UnitStatus)
+				for n, u := range cur {
+					if oldU, ok := old[n]; !ok || isChanged(oldU, u) {
+						changed[n] = u
+					}
+					delete(old, n)
+				}
+
+				// add all deleted units
+				for oldN := range old {
+					changed[oldN] = nil
+				}
+
+				old = cur
+
+				if len(changed) != 0 {
+					statusChan <- changed
+				}
+			} else {
+				errChan <- err
+			}
+
+			<-timerChan
+		}
+	}()
+
+	return statusChan, errChan
+}
+
+type SubStateUpdate struct {
+	UnitName string
+	SubState string
+}
+
+// SetSubStateSubscriber writes to updateCh when any unit's substate changes.
+// Although this writes to updateCh on every state change, the reported state
+// may be more recent than the change that generated it (due to an unavoidable
+// race in the systemd dbus interface).  That is, this method provides a good
+// way to keep a current view of all units' states, but is not guaranteed to
+// show every state transition they go through.  Furthermore, state changes
+// will only be written to the channel with non-blocking writes.  If updateCh
+// is full, it attempts to write an error to errCh; if errCh is full, the error
+// passes silently.
+func (c *Conn) SetSubStateSubscriber(updateCh chan<- *SubStateUpdate, errCh chan<- error) {
+	c.subscriber.Lock()
+	defer c.subscriber.Unlock()
+	c.subscriber.updateCh = updateCh
+	c.subscriber.errCh = errCh
+}
+
+func (c *Conn) sendSubStateUpdate(path dbus.ObjectPath) {
+	c.subscriber.Lock()
+	defer c.subscriber.Unlock()
+	if c.subscriber.updateCh == nil {
+		return
+	}
+
+	if c.shouldIgnore(path) {
+		return
+	}
+
+	info, err := c.GetUnitProperties(string(path))
+	if err != nil {
+		select {
+		case c.subscriber.errCh <- err:
+		default:
+		}
+	}
+
+	name := info["Id"].(string)
+	substate := info["SubState"].(string)
+
+	update := &SubStateUpdate{name, substate}
+	select {
+	case c.subscriber.updateCh <- update:
+	default:
+		select {
+		case c.subscriber.errCh <- errors.New("update channel full!"):
+		default:
+		}
+	}
+
+	c.updateIgnore(path, info)
+}
+
+// The ignore functions work around a wart in the systemd dbus interface.
+// Requesting the properties of an unloaded unit will cause systemd to send a
+// pair of UnitNew/UnitRemoved signals.  Because we need to get a unit's
+// properties on UnitNew (as that's the only indication of a new unit coming up
+// for the first time), we would enter an infinite loop if we did not attempt
+// to detect and ignore these spurious signals.  The signal themselves are
+// indistinguishable from relevant ones, so we (somewhat hackishly) ignore an
+// unloaded unit's signals for a short time after requesting its properties.
+// This means that we will miss e.g. a transient unit being restarted
+// *immediately* upon failure and also a transient unit being started
+// immediately after requesting its status (with systemctl status, for example,
+// because this causes a UnitNew signal to be sent which then causes us to fetch
+// the properties).
+
+func (c *Conn) shouldIgnore(path dbus.ObjectPath) bool {
+	t, ok := c.subscriber.ignore[path]
+	return ok && t >= time.Now().UnixNano()
+}
+
+func (c *Conn) updateIgnore(path dbus.ObjectPath, info map[string]interface{}) {
+	c.cleanIgnore()
+
+	// unit is unloaded - it will trigger bad systemd dbus behavior
+	if info["LoadState"].(string) == "not-found" {
+		c.subscriber.ignore[path] = time.Now().UnixNano() + ignoreInterval
+	}
+}
+
+// without this, ignore would grow unboundedly over time
+func (c *Conn) cleanIgnore() {
+	now := time.Now().UnixNano()
+	if c.subscriber.cleanIgnore < now {
+		c.subscriber.cleanIgnore = now + cleanIgnoreInterval
+
+		for p, t := range c.subscriber.ignore {
+			if t < now {
+				delete(c.subscriber.ignore, p)
+			}
+		}
+	}
+}

Godeps/_workspace/src/github.com/coreos/go-systemd/dbus/subscription_set.go

+package dbus
+
+import (
+	"time"
+)
+
+// SubscriptionSet returns a subscription set which is like conn.Subscribe but
+// can filter to only return events for a set of units.
+type SubscriptionSet struct {
+	*set
+	conn *Conn
+}
+
+func (s *SubscriptionSet) filter(unit string) bool {
+	return !s.Contains(unit)
+}
+
+// Subscribe starts listening for dbus events for all of the units in the set.
+// Returns channels identical to conn.SubscribeUnits.
+func (s *SubscriptionSet) Subscribe() (<-chan map[string]*UnitStatus, <-chan error) {
+	// TODO: Make fully evented by using systemd 209 with properties changed values
+	return s.conn.SubscribeUnitsCustom(time.Second, 0,
+		mismatchUnitStatus,
+		func(unit string) bool { return s.filter(unit) },
+	)
+}
+
+// NewSubscriptionSet returns a new subscription set.
+func (conn *Conn) NewSubscriptionSet() *SubscriptionSet {
+	return &SubscriptionSet{newSet(), conn}
+}
+
+// mismatchUnitStatus returns true if the provided UnitStatus objects
+// are not equivalent. false is returned if the objects are equivalent.
+// Only the Name, Description and state-related fields are used in
+// the comparison.
+func mismatchUnitStatus(u1, u2 *UnitStatus) bool {
+	return u1.Name != u2.Name ||
+		u1.Description != u2.Description ||
+		u1.LoadState != u2.LoadState ||
+		u1.ActiveState != u2.ActiveState ||
+		u1.SubState != u2.SubState
+}

Godeps/_workspace/src/github.com/coreos/go-systemd/dbus/subscription_set_test.go

+package dbus
+
+import (
+	"testing"
+	"time"
+)
+
+// TestSubscribeUnit exercises the basics of subscription of a particular unit.
+func TestSubscriptionSetUnit(t *testing.T) {
+	target := "subscribe-events-set.service"
+
+	conn, err := New()
+
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = conn.Subscribe()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	subSet := conn.NewSubscriptionSet()
+	evChan, errChan := subSet.Subscribe()
+
+	subSet.Add(target)
+	setupUnit(target, conn, t)
+	linkUnit(target, conn, t)
+
+	job, err := conn.StartUnit(target, "replace")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if job != "done" {
+		t.Fatal("Couldn't start", target)
+	}
+
+	timeout := make(chan bool, 1)
+	go func() {
+		time.Sleep(3 * time.Second)
+		close(timeout)
+	}()
+
+	for {
+		select {
+		case changes := <-evChan:
+			tCh, ok := changes[target]
+
+			if !ok {
+				t.Fatal("Unexpected event:", changes)
+			}
+
+			if tCh.ActiveState == "active" && tCh.Name == target {
+				goto success
+			}
+		case err = <-errChan:
+			t.Fatal(err)
+		case <-timeout:
+			t.Fatal("Reached timeout")
+		}
+	}
+
+success:
+	return
+}

Godeps/_workspace/src/github.com/coreos/go-systemd/dbus/subscription_test.go

+package dbus
+
+import (
+	"testing"
+	"time"
+)
+
+// TestSubscribe exercises the basics of subscription
+func TestSubscribe(t *testing.T) {
+	conn, err := New()
+
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = conn.Subscribe()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = conn.Unsubscribe()
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+// TestSubscribeUnit exercises the basics of subscription of a particular unit.
+func TestSubscribeUnit(t *testing.T) {
+	target := "subscribe-events.service"
+
+	conn, err := New()
+
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = conn.Subscribe()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = conn.Unsubscribe()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	evChan, errChan := conn.SubscribeUnits(time.Second)
+
+	setupUnit(target, conn, t)
+	linkUnit(target, conn, t)
+
+	job, err := conn.StartUnit(target, "replace")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if job != "done" {
+		t.Fatal("Couldn't start", target)
+	}
+
+	timeout := make(chan bool, 1)
+	go func() {
+		time.Sleep(3 * time.Second)
+		close(timeout)
+	}()
+
+	for {
+		select {
+		case changes := <-evChan:
+			tCh, ok := changes[target]
+
+			// Just continue until we see our event.
+			if !ok {
+				continue
+			}
+
+			if tCh.ActiveState == "active" && tCh.Name == target {
+				goto success
+			}
+		case err = <-errChan:
+			t.Fatal(err)
+		case <-timeout:
+			t.Fatal("Reached timeout")
+		}
+	}
+
+success:
+	return
+}
+
+

Godeps/_workspace/src/github.com/docker/docker/pkg/mount/MAINTAINERS

+Michael Crosby <michael@crosbymichael.com> (@crosbymichael)

Godeps/_workspace/src/github.com/docker/docker/pkg/mount/flags.go

+package mount
+
+import (
+	"strings"
+)
+
+// Parse fstab type mount options into mount() flags
+// and device specific data
+func parseOptions(options string) (int, string) {
+	var (
+		flag int
+		data []string
+	)
+
+	flags := map[string]struct {
+		clear bool
+		flag  int
+	}{
+		"defaults":      {false, 0},
+		"ro":            {false, RDONLY},
+		"rw":            {true, RDONLY},
+		"suid":          {true, NOSUID},
+		"nosuid":        {false, NOSUID},
+		"dev":           {true, NODEV},
+		"nodev":         {false, NODEV},
+		"exec":          {true, NOEXEC},
+		"noexec":        {false, NOEXEC},
+		"sync":          {false, SYNCHRONOUS},
+		"async":         {true, SYNCHRONOUS},
+		"dirsync":       {false, DIRSYNC},
+		"remount":       {false, REMOUNT},
+		"mand":          {false, MANDLOCK},
+		"nomand":        {true, MANDLOCK},
+		"atime":         {true, NOATIME},
+		"noatime":       {false, NOATIME},
+		"diratime":      {true, NODIRATIME},
+		"nodiratime":    {false, NODIRATIME},
+		"bind":          {false, BIND},
+		"rbind":         {false, RBIND},
+		"unbindable":    {false, UNBINDABLE},
+		"runbindable":   {false, RUNBINDABLE},
+		"private":       {false, PRIVATE},
+		"rprivate":      {false, RPRIVATE},
+		"shared":        {false, SHARED},
+		"rshared":       {false, RSHARED},
+		"slave":         {false, SLAVE},
+		"rslave":        {false, RSLAVE},
+		"relatime":      {false, RELATIME},
+		"norelatime":    {true, RELATIME},
+		"strictatime":   {false, STRICTATIME},
+		"nostrictatime": {true, STRICTATIME},
+	}
+
+	for _, o := range strings.Split(options, ",") {
+		// If the option does not exist in the flags table or the flag
+		// is not supported on the platform,
+		// then it is a data value for a specific fs type
+		if f, exists := flags[o]; exists && f.flag != 0 {
+			if f.clear {
+				flag &= ^f.flag
+			} else {
+				flag |= f.flag
+			}
+		} else {
+			data = append(data, o)
+		}
+	}
+	return flag, strings.Join(data, ",")
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/mount/flags_freebsd.go

+// +build freebsd,cgo
+
+package mount
+
+/*
+#include <sys/mount.h>
+*/
+import "C"
+
+const (
+	RDONLY      = C.MNT_RDONLY
+	NOSUID      = C.MNT_NOSUID
+	NOEXEC      = C.MNT_NOEXEC
+	SYNCHRONOUS = C.MNT_SYNCHRONOUS
+	NOATIME     = C.MNT_NOATIME
+
+	BIND        = 0
+	DIRSYNC     = 0
+	MANDLOCK    = 0
+	NODEV       = 0
+	NODIRATIME  = 0
+	UNBINDABLE  = 0
+	RUNBINDABLE = 0
+	PRIVATE     = 0
+	RPRIVATE    = 0
+	SHARED      = 0
+	RSHARED     = 0
+	SLAVE       = 0
+	RSLAVE      = 0
+	RBIND       = 0
+	RELATIVE    = 0
+	RELATIME    = 0
+	REMOUNT     = 0
+	STRICTATIME = 0
+)

Godeps/_workspace/src/github.com/docker/docker/pkg/mount/flags_linux.go

+package mount
+
+import (
+	"syscall"
+)
+
+const (
+	RDONLY      = syscall.MS_RDONLY
+	NOSUID      = syscall.MS_NOSUID
+	NODEV       = syscall.MS_NODEV
+	NOEXEC      = syscall.MS_NOEXEC
+	SYNCHRONOUS = syscall.MS_SYNCHRONOUS
+	DIRSYNC     = syscall.MS_DIRSYNC
+	REMOUNT     = syscall.MS_REMOUNT
+	MANDLOCK    = syscall.MS_MANDLOCK
+	NOATIME     = syscall.MS_NOATIME
+	NODIRATIME  = syscall.MS_NODIRATIME
+	BIND        = syscall.MS_BIND
+	RBIND       = syscall.MS_BIND | syscall.MS_REC
+	UNBINDABLE  = syscall.MS_UNBINDABLE
+	RUNBINDABLE = syscall.MS_UNBINDABLE | syscall.MS_REC
+	PRIVATE     = syscall.MS_PRIVATE
+	RPRIVATE    = syscall.MS_PRIVATE | syscall.MS_REC
+	SLAVE       = syscall.MS_SLAVE
+	RSLAVE      = syscall.MS_SLAVE | syscall.MS_REC
+	SHARED      = syscall.MS_SHARED
+	RSHARED     = syscall.MS_SHARED | syscall.MS_REC
+	RELATIME    = syscall.MS_RELATIME
+	STRICTATIME = syscall.MS_STRICTATIME
+)

Godeps/_workspace/src/github.com/docker/docker/pkg/mount/flags_unsupported.go

+// +build !linux,!freebsd freebsd,!cgo
+
+package mount
+
+const (
+	BIND        = 0
+	DIRSYNC     = 0
+	MANDLOCK    = 0
+	NOATIME     = 0
+	NODEV       = 0
+	NODIRATIME  = 0
+	NOEXEC      = 0
+	NOSUID      = 0
+	UNBINDABLE  = 0
+	RUNBINDABLE = 0
+	PRIVATE     = 0
+	RPRIVATE    = 0
+	SHARED      = 0
+	RSHARED     = 0
+	SLAVE       = 0
+	RSLAVE      = 0
+	RBIND       = 0
+	RELATIME    = 0
+	RELATIVE    = 0
+	REMOUNT     = 0
+	STRICTATIME = 0
+	SYNCHRONOUS = 0
+	RDONLY      = 0
+)

Godeps/_workspace/src/github.com/docker/docker/pkg/mount/mount.go

+package mount
+
+import (
+	"time"
+)
+
+func GetMounts() ([]*MountInfo, error) {
+	return parseMountTable()
+}
+
+// Looks at /proc/self/mountinfo to determine of the specified
+// mountpoint has been mounted
+func Mounted(mountpoint string) (bool, error) {
+	entries, err := parseMountTable()
+	if err != nil {
+		return false, err
+	}
+
+	// Search the table for the mountpoint
+	for _, e := range entries {
+		if e.Mountpoint == mountpoint {
+			return true, nil
+		}
+	}
+	return false, nil
+}
+
+// Mount the specified options at the target path only if
+// the target is not mounted
+// Options must be specified as fstab style
+func Mount(device, target, mType, options string) error {
+	flag, _ := parseOptions(options)
+	if flag&REMOUNT != REMOUNT {
+		if mounted, err := Mounted(target); err != nil || mounted {
+			return err
+		}
+	}
+	return ForceMount(device, target, mType, options)
+}
+
+// Mount the specified options at the target path
+// reguardless if the target is mounted or not
+// Options must be specified as fstab style
+func ForceMount(device, target, mType, options string) error {
+	flag, data := parseOptions(options)
+	if err := mount(device, target, mType, uintptr(flag), data); err != nil {
+		return err
+	}
+	return nil
+}
+
+// Unmount the target only if it is mounted
+func Unmount(target string) error {
+	if mounted, err := Mounted(target); err != nil || !mounted {
+		return err
+	}
+	return ForceUnmount(target)
+}
+
+// Unmount the target reguardless if it is mounted or not
+func ForceUnmount(target string) (err error) {
+	// Simple retry logic for unmount
+	for i := 0; i < 10; i++ {
+		if err = unmount(target, 0); err == nil {
+			return nil
+		}
+		time.Sleep(100 * time.Millisecond)
+	}
+	return
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/mount/mount_test.go

+package mount
+
+import (
+	"os"
+	"path"
+	"testing"
+)
+
+func TestMountOptionsParsing(t *testing.T) {
+	options := "noatime,ro,size=10k"
+
+	flag, data := parseOptions(options)
+
+	if data != "size=10k" {
+		t.Fatalf("Expected size=10 got %s", data)
+	}
+
+	expectedFlag := NOATIME | RDONLY
+
+	if flag != expectedFlag {
+		t.Fatalf("Expected %d got %d", expectedFlag, flag)
+	}
+}
+
+func TestMounted(t *testing.T) {
+	tmp := path.Join(os.TempDir(), "mount-tests")
+	if err := os.MkdirAll(tmp, 0777); err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmp)
+
+	var (
+		sourceDir  = path.Join(tmp, "source")
+		targetDir  = path.Join(tmp, "target")
+		sourcePath = path.Join(sourceDir, "file.txt")
+		targetPath = path.Join(targetDir, "file.txt")
+	)
+
+	os.Mkdir(sourceDir, 0777)
+	os.Mkdir(targetDir, 0777)
+
+	f, err := os.Create(sourcePath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	f.WriteString("hello")
+	f.Close()
+
+	f, err = os.Create(targetPath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	f.Close()
+
+	if err := Mount(sourceDir, targetDir, "none", "bind,rw"); err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		if err := Unmount(targetDir); err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	mounted, err := Mounted(targetDir)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !mounted {
+		t.Fatalf("Expected %s to be mounted", targetDir)
+	}
+	if _, err := os.Stat(targetDir); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestMountReadonly(t *testing.T) {
+	tmp := path.Join(os.TempDir(), "mount-tests")
+	if err := os.MkdirAll(tmp, 0777); err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmp)
+
+	var (
+		sourceDir  = path.Join(tmp, "source")
+		targetDir  = path.Join(tmp, "target")
+		sourcePath = path.Join(sourceDir, "file.txt")
+		targetPath = path.Join(targetDir, "file.txt")
+	)
+
+	os.Mkdir(sourceDir, 0777)
+	os.Mkdir(targetDir, 0777)
+
+	f, err := os.Create(sourcePath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	f.WriteString("hello")
+	f.Close()
+
+	f, err = os.Create(targetPath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	f.Close()
+
+	if err := Mount(sourceDir, targetDir, "none", "bind,ro"); err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		if err := Unmount(targetDir); err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	f, err = os.OpenFile(targetPath, os.O_RDWR, 0777)
+	if err == nil {
+		t.Fatal("Should not be able to open a ro file as rw")
+	}
+}
+
+func TestGetMounts(t *testing.T) {
+	mounts, err := GetMounts()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	root := false
+	for _, entry := range mounts {
+		if entry.Mountpoint == "/" {
+			root = true
+		}
+	}
+
+	if !root {
+		t.Fatal("/ should be mounted at least")
+	}
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/mount/mounter_freebsd.go

+package mount
+
+/*
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/_iovec.h>
+#include <sys/mount.h>
+#include <sys/param.h>
+*/
+import "C"
+
+import (
+	"fmt"
+	"strings"
+	"syscall"
+	"unsafe"
+)
+
+func allocateIOVecs(options []string) []C.struct_iovec {
+	out := make([]C.struct_iovec, len(options))
+	for i, option := range options {
+		out[i].iov_base = unsafe.Pointer(C.CString(option))
+		out[i].iov_len = C.size_t(len(option) + 1)
+	}
+	return out
+}
+
+func mount(device, target, mType string, flag uintptr, data string) error {
+	isNullFS := false
+
+	xs := strings.Split(data, ",")
+	for _, x := range xs {
+		if x == "bind" {
+			isNullFS = true
+		}
+	}
+
+	options := []string{"fspath", target}
+	if isNullFS {
+		options = append(options, "fstype", "nullfs", "target", device)
+	} else {
+		options = append(options, "fstype", mType, "from", device)
+	}
+	rawOptions := allocateIOVecs(options)
+	for _, rawOption := range rawOptions {
+		defer C.free(rawOption.iov_base)
+	}
+
+	if errno := C.nmount(&rawOptions[0], C.uint(len(options)), C.int(flag)); errno != 0 {
+		reason := C.GoString(C.strerror(*C.__error()))
+		return fmt.Errorf("Failed to call nmount: %s", reason)
+	}
+	return nil
+}
+
+func unmount(target string, flag int) error {
+	return syscall.Unmount(target, flag)
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/mount/mounter_linux.go

+package mount
+
+import (
+	"syscall"
+)
+
+func mount(device, target, mType string, flag uintptr, data string) error {
+	if err := syscall.Mount(device, target, mType, flag, data); err != nil {
+		return err
+	}
+
+	// If we have a bind mount or remount, remount...
+	if flag&syscall.MS_BIND == syscall.MS_BIND && flag&syscall.MS_RDONLY == syscall.MS_RDONLY {
+		return syscall.Mount(device, target, mType, flag|syscall.MS_REMOUNT, data)
+	}
+	return nil
+}
+
+func unmount(target string, flag int) error {
+	return syscall.Unmount(target, flag)
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/mount/mounter_unsupported.go

+// +build !linux,!freebsd freebsd,!cgo
+
+package mount
+
+func mount(device, target, mType string, flag uintptr, data string) error {
+	panic("Not implemented")
+}
+
+func unmount(target string, flag int) error {
+	panic("Not implemented")
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/mount/mountinfo.go

+package mount
+
+type MountInfo struct {
+	Id, Parent, Major, Minor         int
+	Root, Mountpoint, Opts, Optional string
+	Fstype, Source, VfsOpts          string
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/mount/mountinfo_freebsd.go

+package mount
+
+/*
+#include <sys/param.h>
+#include <sys/ucred.h>
+#include <sys/mount.h>
+*/
+import "C"
+
+import (
+	"fmt"
+	"reflect"
+	"unsafe"
+)
+
+// Parse /proc/self/mountinfo because comparing Dev and ino does not work from bind mounts
+func parseMountTable() ([]*MountInfo, error) {
+	var rawEntries *C.struct_statfs
+
+	count := int(C.getmntinfo(&rawEntries, C.MNT_WAIT))
+	if count == 0 {
+		return nil, fmt.Errorf("Failed to call getmntinfo")
+	}
+
+	var entries []C.struct_statfs
+	header := (*reflect.SliceHeader)(unsafe.Pointer(&entries))
+	header.Cap = count
+	header.Len = count
+	header.Data = uintptr(unsafe.Pointer(rawEntries))
+
+	var out []*MountInfo
+	for _, entry := range entries {
+		var mountinfo MountInfo
+		mountinfo.Mountpoint = C.GoString(&entry.f_mntonname[0])
+		mountinfo.Source = C.GoString(&entry.f_mntfromname[0])
+		mountinfo.Fstype = C.GoString(&entry.f_fstypename[0])
+		out = append(out, &mountinfo)
+	}
+	return out, nil
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/mount/mountinfo_linux.go

+// +build linux
+
+package mount
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"os"
+	"strings"
+)
+
+const (
+	/* 36 35 98:0 /mnt1 /mnt2 rw,noatime master:1 - ext3 /dev/root rw,errors=continue
+	   (1)(2)(3)   (4)   (5)      (6)      (7)   (8) (9)   (10)         (11)
+
+	   (1) mount ID:  unique identifier of the mount (may be reused after umount)
+	   (2) parent ID:  ID of parent (or of self for the top of the mount tree)
+	   (3) major:minor:  value of st_dev for files on filesystem
+	   (4) root:  root of the mount within the filesystem
+	   (5) mount point:  mount point relative to the process's root
+	   (6) mount options:  per mount options
+	   (7) optional fields:  zero or more fields of the form "tag[:value]"
+	   (8) separator:  marks the end of the optional fields
+	   (9) filesystem type:  name of filesystem of the form "type[.subtype]"
+	   (10) mount source:  filesystem specific information or "none"
+	   (11) super options:  per super block options*/
+	mountinfoFormat = "%d %d %d:%d %s %s %s %s"
+)
+
+// Parse /proc/self/mountinfo because comparing Dev and ino does not work from bind mounts
+func parseMountTable() ([]*MountInfo, error) {
+	f, err := os.Open("/proc/self/mountinfo")
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	return parseInfoFile(f)
+}
+
+func parseInfoFile(r io.Reader) ([]*MountInfo, error) {
+	var (
+		s   = bufio.NewScanner(r)
+		out = []*MountInfo{}
+	)
+
+	for s.Scan() {
+		if err := s.Err(); err != nil {
+			return nil, err
+		}
+
+		var (
+			p              = &MountInfo{}
+			text           = s.Text()
+			optionalFields string
+		)
+
+		if _, err := fmt.Sscanf(text, mountinfoFormat,
+			&p.Id, &p.Parent, &p.Major, &p.Minor,
+			&p.Root, &p.Mountpoint, &p.Opts, &optionalFields); err != nil {
+			return nil, fmt.Errorf("Scanning '%s' failed: %s", text, err)
+		}
+		// Safe as mountinfo encodes mountpoints with spaces as \040.
+		index := strings.Index(text, " - ")
+		postSeparatorFields := strings.Fields(text[index+3:])
+		if len(postSeparatorFields) < 3 {
+			return nil, fmt.Errorf("Error found less than 3 fields post '-' in %q", text)
+		}
+
+		if optionalFields != "-" {
+			p.Optional = optionalFields
+		}
+
+		p.Fstype = postSeparatorFields[0]
+		p.Source = postSeparatorFields[1]
+		p.VfsOpts = strings.Join(postSeparatorFields[2:], " ")
+		out = append(out, p)
+	}
+	return out, nil
+}
+
+// PidMountInfo collects the mounts for a specific Pid
+func PidMountInfo(pid int) ([]*MountInfo, error) {
+	f, err := os.Open(fmt.Sprintf("/proc/%d/mountinfo", pid))
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	return parseInfoFile(f)
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/mount/mountinfo_unsupported.go

+// +build !linux,!freebsd freebsd,!cgo
+
+package mount
+
+import (
+	"fmt"
+	"runtime"
+)
+
+func parseMountTable() ([]*MountInfo, error) {
+	return nil, fmt.Errorf("mount.parseMountTable is not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/mount/sharedsubtree_linux.go

+// +build linux
+
+package mount
+
+func MakeShared(mountPoint string) error {
+	return ensureMountedAs(mountPoint, "shared")
+}
+
+func MakeRShared(mountPoint string) error {
+	return ensureMountedAs(mountPoint, "rshared")
+}
+
+func MakePrivate(mountPoint string) error {
+	return ensureMountedAs(mountPoint, "private")
+}
+
+func MakeRPrivate(mountPoint string) error {
+	return ensureMountedAs(mountPoint, "rprivate")
+}
+
+func MakeSlave(mountPoint string) error {
+	return ensureMountedAs(mountPoint, "slave")
+}
+
+func MakeRSlave(mountPoint string) error {
+	return ensureMountedAs(mountPoint, "rslave")
+}
+
+func MakeUnbindable(mountPoint string) error {
+	return ensureMountedAs(mountPoint, "unbindable")
+}
+
+func MakeRUnbindable(mountPoint string) error {
+	return ensureMountedAs(mountPoint, "runbindable")
+}
+
+func ensureMountedAs(mountPoint, options string) error {
+	mounted, err := Mounted(mountPoint)
+	if err != nil {
+		return err
+	}
+
+	if !mounted {
+		if err := Mount(mountPoint, mountPoint, "none", "bind,rw"); err != nil {
+			return err
+		}
+	}
+	mounted, err = Mounted(mountPoint)
+	if err != nil {
+		return err
+	}
+
+	return ForceMount("", mountPoint, "none", options)
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/mount/sharedsubtree_linux_test.go

+// +build linux
+
+package mount
+
+import (
+	"os"
+	"path"
+	"syscall"
+	"testing"
+)
+
+// nothing is propogated in or out
+func TestSubtreePrivate(t *testing.T) {
+	tmp := path.Join(os.TempDir(), "mount-tests")
+	if err := os.MkdirAll(tmp, 0777); err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmp)
+
+	var (
+		sourceDir   = path.Join(tmp, "source")
+		targetDir   = path.Join(tmp, "target")
+		outside1Dir = path.Join(tmp, "outside1")
+		outside2Dir = path.Join(tmp, "outside2")
+
+		outside1Path      = path.Join(outside1Dir, "file.txt")
+		outside2Path      = path.Join(outside2Dir, "file.txt")
+		outside1CheckPath = path.Join(targetDir, "a", "file.txt")
+		outside2CheckPath = path.Join(sourceDir, "b", "file.txt")
+	)
+	if err := os.MkdirAll(path.Join(sourceDir, "a"), 0777); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.MkdirAll(path.Join(sourceDir, "b"), 0777); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Mkdir(targetDir, 0777); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Mkdir(outside1Dir, 0777); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Mkdir(outside2Dir, 0777); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := createFile(outside1Path); err != nil {
+		t.Fatal(err)
+	}
+	if err := createFile(outside2Path); err != nil {
+		t.Fatal(err)
+	}
+
+	// mount the shared directory to a target
+	if err := Mount(sourceDir, targetDir, "none", "bind,rw"); err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		if err := Unmount(targetDir); err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	// next, make the target private
+	if err := MakePrivate(targetDir); err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		if err := Unmount(targetDir); err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	// mount in an outside path to a mounted path inside the _source_
+	if err := Mount(outside1Dir, path.Join(sourceDir, "a"), "none", "bind,rw"); err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		if err := Unmount(path.Join(sourceDir, "a")); err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	// check that this file _does_not_ show in the _target_
+	if _, err := os.Stat(outside1CheckPath); err != nil && !os.IsNotExist(err) {
+		t.Fatal(err)
+	} else if err == nil {
+		t.Fatalf("%q should not be visible, but is", outside1CheckPath)
+	}
+
+	// next mount outside2Dir into the _target_
+	if err := Mount(outside2Dir, path.Join(targetDir, "b"), "none", "bind,rw"); err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		if err := Unmount(path.Join(targetDir, "b")); err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	// check that this file _does_not_ show in the _source_
+	if _, err := os.Stat(outside2CheckPath); err != nil && !os.IsNotExist(err) {
+		t.Fatal(err)
+	} else if err == nil {
+		t.Fatalf("%q should not be visible, but is", outside2CheckPath)
+	}
+}
+
+// Testing that when a target is a shared mount,
+// then child mounts propogate to the source
+func TestSubtreeShared(t *testing.T) {
+	tmp := path.Join(os.TempDir(), "mount-tests")
+	if err := os.MkdirAll(tmp, 0777); err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmp)
+
+	var (
+		sourceDir  = path.Join(tmp, "source")
+		targetDir  = path.Join(tmp, "target")
+		outsideDir = path.Join(tmp, "outside")
+
+		outsidePath     = path.Join(outsideDir, "file.txt")
+		sourceCheckPath = path.Join(sourceDir, "a", "file.txt")
+	)
+
+	if err := os.MkdirAll(path.Join(sourceDir, "a"), 0777); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Mkdir(targetDir, 0777); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Mkdir(outsideDir, 0777); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := createFile(outsidePath); err != nil {
+		t.Fatal(err)
+	}
+
+	// mount the source as shared
+	if err := MakeShared(sourceDir); err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		if err := Unmount(sourceDir); err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	// mount the shared directory to a target
+	if err := Mount(sourceDir, targetDir, "none", "bind,rw"); err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		if err := Unmount(targetDir); err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	// mount in an outside path to a mounted path inside the target
+	if err := Mount(outsideDir, path.Join(targetDir, "a"), "none", "bind,rw"); err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		if err := Unmount(path.Join(targetDir, "a")); err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	// NOW, check that the file from the outside directory is avaible in the source directory
+	if _, err := os.Stat(sourceCheckPath); err != nil {
+		t.Fatal(err)
+	}
+}
+
+// testing that mounts to a shared source show up in the slave target,
+// and that mounts into a slave target do _not_ show up in the shared source
+func TestSubtreeSharedSlave(t *testing.T) {
+	tmp := path.Join(os.TempDir(), "mount-tests")
+	if err := os.MkdirAll(tmp, 0777); err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmp)
+
+	var (
+		sourceDir   = path.Join(tmp, "source")
+		targetDir   = path.Join(tmp, "target")
+		outside1Dir = path.Join(tmp, "outside1")
+		outside2Dir = path.Join(tmp, "outside2")
+
+		outside1Path      = path.Join(outside1Dir, "file.txt")
+		outside2Path      = path.Join(outside2Dir, "file.txt")
+		outside1CheckPath = path.Join(targetDir, "a", "file.txt")
+		outside2CheckPath = path.Join(sourceDir, "b", "file.txt")
+	)
+	if err := os.MkdirAll(path.Join(sourceDir, "a"), 0777); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.MkdirAll(path.Join(sourceDir, "b"), 0777); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Mkdir(targetDir, 0777); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Mkdir(outside1Dir, 0777); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Mkdir(outside2Dir, 0777); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := createFile(outside1Path); err != nil {
+		t.Fatal(err)
+	}
+	if err := createFile(outside2Path); err != nil {
+		t.Fatal(err)
+	}
+
+	// mount the source as shared
+	if err := MakeShared(sourceDir); err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		if err := Unmount(sourceDir); err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	// mount the shared directory to a target
+	if err := Mount(sourceDir, targetDir, "none", "bind,rw"); err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		if err := Unmount(targetDir); err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	// next, make the target slave
+	if err := MakeSlave(targetDir); err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		if err := Unmount(targetDir); err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	// mount in an outside path to a mounted path inside the _source_
+	if err := Mount(outside1Dir, path.Join(sourceDir, "a"), "none", "bind,rw"); err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		if err := Unmount(path.Join(sourceDir, "a")); err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	// check that this file _does_ show in the _target_
+	if _, err := os.Stat(outside1CheckPath); err != nil {
+		t.Fatal(err)
+	}
+
+	// next mount outside2Dir into the _target_
+	if err := Mount(outside2Dir, path.Join(targetDir, "b"), "none", "bind,rw"); err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		if err := Unmount(path.Join(targetDir, "b")); err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	// check that this file _does_not_ show in the _source_
+	if _, err := os.Stat(outside2CheckPath); err != nil && !os.IsNotExist(err) {
+		t.Fatal(err)
+	} else if err == nil {
+		t.Fatalf("%q should not be visible, but is", outside2CheckPath)
+	}
+}
+
+func TestSubtreeUnbindable(t *testing.T) {
+	tmp := path.Join(os.TempDir(), "mount-tests")
+	if err := os.MkdirAll(tmp, 0777); err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmp)
+
+	var (
+		sourceDir = path.Join(tmp, "source")
+		targetDir = path.Join(tmp, "target")
+	)
+	if err := os.MkdirAll(sourceDir, 0777); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.MkdirAll(targetDir, 0777); err != nil {
+		t.Fatal(err)
+	}
+
+	// next, make the source unbindable
+	if err := MakeUnbindable(sourceDir); err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		if err := Unmount(sourceDir); err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	// then attempt to mount it to target. It should fail
+	if err := Mount(sourceDir, targetDir, "none", "bind,rw"); err != nil && err != syscall.EINVAL {
+		t.Fatal(err)
+	} else if err == nil {
+		t.Fatalf("%q should not have been bindable", sourceDir)
+	}
+	defer func() {
+		if err := Unmount(targetDir); err != nil {
+			t.Fatal(err)
+		}
+	}()
+}
+
+func createFile(path string) error {
+	f, err := os.Create(path)
+	if err != nil {
+		return err
+	}
+	f.WriteString("hello world!")
+	return f.Close()
+}

Godeps/_workspace/src/github.com/docker/docker/pkg/symlink/LICENSE.BSD

+Copyright (c) 2014-2015 The Docker & Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Godeps/_workspace/src/github.com/docker/docker/pkg/symlink/MAINTAINERS

+Tibor Vass <teabee89@gmail.com> (@tiborvass)
+Cristian Staretu <cristian.staretu@gmail.com> (@unclejack)
+Tianon Gravi <admwiggin@gmail.com> (@tianon)

Godeps/_workspace/src/github.com/docker/docker/pkg/symlink/README.md

+Package symlink implements EvalSymlinksInScope which is an extension of filepath.EvalSymlinks
+from the [Go standard library](https://golang.org/pkg/path/filepath).
+
+The code from filepath.EvalSymlinks has been adapted in fs.go.
+Please read the LICENSE.BSD file that governs fs.go and LICENSE.APACHE for fs_test.go.

Godeps/_workspace/src/github.com/docker/docker/pkg/symlink/fs.go

+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE.BSD file.
+
+// This code is a modified version of path/filepath/symlink.go from the Go standard library.
+
+package symlink
+
+import (
+	"bytes"
+	"errors"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// FollowSymlinkInScope is a wrapper around evalSymlinksInScope that returns an absolute path
+func FollowSymlinkInScope(path, root string) (string, error) {
+	path, err := filepath.Abs(path)
+	if err != nil {
+		return "", err
+	}
+	root, err = filepath.Abs(root)
+	if err != nil {
+		return "", err
+	}
+	return evalSymlinksInScope(path, root)
+}
+
+// evalSymlinksInScope will evaluate symlinks in `path` within a scope `root` and return
+// a result guaranteed to be contained within the scope `root`, at the time of the call.
+// Symlinks in `root` are not evaluated and left as-is.
+// Errors encountered while attempting to evaluate symlinks in path will be returned.
+// Non-existing paths are valid and do not constitute an error.
+// `path` has to contain `root` as a prefix, or else an error will be returned.
+// Trying to break out from `root` does not constitute an error.
+//
+// Example:
+//   If /foo/bar -> /outside,
+//   FollowSymlinkInScope("/foo/bar", "/foo") == "/foo/outside" instead of "/oustide"
+//
+// IMPORTANT: it is the caller's responsibility to call evalSymlinksInScope *after* relevant symlinks
+// are created and not to create subsequently, additional symlinks that could potentially make a
+// previously-safe path, unsafe. Example: if /foo/bar does not exist, evalSymlinksInScope("/foo/bar", "/foo")
+// would return "/foo/bar". If one makes /foo/bar a symlink to /baz subsequently, then "/foo/bar" should
+// no longer be considered safely contained in "/foo".
+func evalSymlinksInScope(path, root string) (string, error) {
+	root = filepath.Clean(root)
+	if path == root {
+		return path, nil
+	}
+	if !strings.HasPrefix(path, root) {
+		return "", errors.New("evalSymlinksInScope: " + path + " is not in " + root)
+	}
+	const maxIter = 255
+	originalPath := path
+	// given root of "/a" and path of "/a/b/../../c" we want path to be "/b/../../c"
+	path = path[len(root):]
+	if root == string(filepath.Separator) {
+		path = string(filepath.Separator) + path
+	}
+	if !strings.HasPrefix(path, string(filepath.Separator)) {
+		return "", errors.New("evalSymlinksInScope: " + path + " is not in " + root)
+	}
+	path = filepath.Clean(path)
+	// consume path by taking each frontmost path element,
+	// expanding it if it's a symlink, and appending it to b
+	var b bytes.Buffer
+	// b here will always be considered to be the "current absolute path inside
+	// root" when we append paths to it, we also append a slash and use
+	// filepath.Clean after the loop to trim the trailing slash
+	for n := 0; path != ""; n++ {
+		if n > maxIter {
+			return "", errors.New("evalSymlinksInScope: too many links in " + originalPath)
+		}
+
+		// find next path component, p
+		i := strings.IndexRune(path, filepath.Separator)
+		var p string
+		if i == -1 {
+			p, path = path, ""
+		} else {
+			p, path = path[:i], path[i+1:]
+		}
+
+		if p == "" {
+			continue
+		}
+
+		// this takes a b.String() like "b/../" and a p like "c" and turns it
+		// into "/b/../c" which then gets filepath.Cleaned into "/c" and then
+		// root gets prepended and we Clean again (to remove any trailing slash
+		// if the first Clean gave us just "/")
+		cleanP := filepath.Clean(string(filepath.Separator) + b.String() + p)
+		if cleanP == string(filepath.Separator) {
+			// never Lstat "/" itself
+			b.Reset()
+			continue
+		}
+		fullP := filepath.Clean(root + cleanP)
+
+		fi, err := os.Lstat(fullP)
+		if os.IsNotExist(err) {
+			// if p does not exist, accept it
+			b.WriteString(p)
+			b.WriteRune(filepath.Separator)
+			continue
+		}
+		if err != nil {
+			return "", err
+		}
+		if fi.Mode()&os.ModeSymlink == 0 {
+			b.WriteString(p + string(filepath.Separator))
+			continue
+		}
+
+		// it's a symlink, put it at the front of path
+		dest, err := os.Readlink(fullP)
+		if err != nil {
+			return "", err
+		}
+		if filepath.IsAbs(dest) {
+			b.Reset()
+		}
+		path = dest + string(filepath.Separator) + path
+	}
+
+	// see note above on "fullP := ..." for why this is double-cleaned and
+	// what's happening here
+	return filepath.Clean(root + filepath.Clean(string(filepath.Separator)+b.String())), nil
+}

Godeps/_workspace/src/github.com/docker/libcontainer/.drone.yml

+image: dockercore/libcontainer
+script:
+# Setup the DockerInDocker environment.
+  - /dind
+  - sed -i 's!docker/docker!docker/libcontainer!' /go/src/github.com/docker/docker/hack/make/.validate
+  - bash /go/src/github.com/docker/docker/hack/make/validate-dco
+  - bash /go/src/github.com/docker/docker/hack/make/validate-gofmt
+  - export GOPATH="$GOPATH:/go:$(pwd)/vendor" # Drone mucks with our GOPATH
+  - make direct-test

Godeps/_workspace/src/github.com/docker/libcontainer/CONTRIBUTING.md

+# The libcontainer Contributors' Guide
+
+Want to hack on libcontainer? Awesome! Here are instructions to get you
+started. They are probably not perfect, please let us know if anything
+feels wrong or incomplete.
+
+## Reporting Issues
+
+When reporting [issues](https://github.com/docker/libcontainer/issues)
+on GitHub please include your host OS (Ubuntu 12.04, Fedora 19, etc),
+the output of `uname -a`. Please include the steps required to reproduce
+the problem if possible and applicable.
+This information will help us review and fix your issue faster.
+
+## Development Environment
+
+### Requirements
+
+For best results, use a Linux development environment.
+The following packages are required to compile libcontainer natively.
+
+- Golang 1.3
+- GCC
+- git
+- cgutils
+
+You can develop on OSX, but you are limited to Dockerfile-based builds only.
+
+### Building libcontainer from Dockerfile
+
+    make all
+
+This is the easiest way of building libcontainer.
+As this build is done using Docker, you can even run this from [OSX](https://github.com/boot2docker/boot2docker)
+
+### Testing changes with "nsinit"
+
+    make sh
+
+This will create an container that runs `nsinit exec sh` on a busybox rootfs with the configuration from ['minimal.json'](https://github.com/docker/libcontainer/blob/master/sample_configs/minimal.json).
+Like the previous command, you can run this on OSX too!
+
+### Building libcontainer directly
+
+> Note: You should add the `vendor` directory to your GOPATH to use the vendored libraries
+
+    ./update-vendor.sh
+    go get -d ./...
+    make direct-build
+    # Run the tests
+    make direct-test-short | egrep --color 'FAIL|$'
+    # Run all the test
+    make direct-test | egrep --color 'FAIL|$'
+
+### Testing Changes with "nsinit" directly
+
+To test a change:
+
+    # Install nsinit
+    make direct-install
+
+    # Optional, add a docker0 bridge
+    ip link add docker0 type bridge
+    ifconfig docker0 172.17.0.1/16 up
+
+    mkdir testfs
+    curl -sSL https://github.com/jpetazzo/docker-busybox/raw/buildroot-2014.02/rootfs.tar | tar -xC testfs
+    cd testfs
+    cp <your-sample-config.json> container.json
+    nsinit exec sh
+
+## Contribution Guidelines
+
+### Pull requests are always welcome
+
+We are always thrilled to receive pull requests, and do our best to
+process them as fast as possible. Not sure if that typo is worth a pull
+request? Do it! We will appreciate it.
+
+If your pull request is not accepted on the first try, don't be
+discouraged! If there's a problem with the implementation, hopefully you
+received feedback on what to improve.
+
+We're trying very hard to keep libcontainer lean and focused. We don't want it
+to do everything for everybody. This means that we might decide against
+incorporating a new feature. However, there might be a way to implement
+that feature *on top of* libcontainer.
+
+### Discuss your design on the mailing list
+
+We recommend discussing your plans [on the mailing
+list](https://groups.google.com/forum/?fromgroups#!forum/libcontainer)
+before starting to code - especially for more ambitious contributions.
+This gives other contributors a chance to point you in the right
+direction, give feedback on your design, and maybe point out if someone
+else is working on the same thing.
+
+### Create issues...
+
+Any significant improvement should be documented as [a GitHub
+issue](https://github.com/docker/libcontainer/issues) before anybody
+starts working on it.
+
+### ...but check for existing issues first!
+
+Please take a moment to check that an issue doesn't already exist
+documenting your bug report or improvement proposal. If it does, it
+never hurts to add a quick "+1" or "I have this problem too". This will
+help prioritize the most common problems and requests.
+
+### Conventions
+
+Fork the repo and make changes on your fork in a feature branch:
+
+- If it's a bugfix branch, name it XXX-something where XXX is the number of the
+  issue
+- If it's a feature branch, create an enhancement issue to announce your
+  intentions, and name it XXX-something where XXX is the number of the issue.
+
+Submit unit tests for your changes.  Go has a great test framework built in; use
+it! Take a look at existing tests for inspiration. Run the full test suite on
+your branch before submitting a pull request.
+
+Update the documentation when creating or modifying features. Test
+your documentation changes for clarity, concision, and correctness, as
+well as a clean documentation build. See ``docs/README.md`` for more
+information on building the docs and how docs get released.
+
+Write clean code. Universally formatted code promotes ease of writing, reading,
+and maintenance. Always run `gofmt -s -w file.go` on each changed file before
+committing your changes. Most editors have plugins that do this automatically.
+
+Pull requests descriptions should be as clear as possible and include a
+reference to all the issues that they address.
+
+Pull requests must not contain commits from other users or branches.
+
+Commit messages must start with a capitalized and short summary (max. 50
+chars) written in the imperative, followed by an optional, more detailed
+explanatory text which is separated from the summary by an empty line.
+
+Code review comments may be added to your pull request. Discuss, then make the
+suggested modifications and push additional commits to your feature branch. Be
+sure to post a comment after pushing. The new commits will show up in the pull
+request automatically, but the reviewers will not be notified unless you
+comment.
+
+Before the pull request is merged, make sure that you squash your commits into
+logical units of work using `git rebase -i` and `git push -f`. After every
+commit the test suite should be passing. Include documentation changes in the
+same commit so that a revert would remove all traces of the feature or fix.
+
+Commits that fix or close an issue should include a reference like `Closes #XXX`
+or `Fixes #XXX`, which will automatically close the issue when merged.
+
+### Testing
+
+Make sure you include suitable tests, preferably unit tests, in your pull request
+and that all the tests pass.
+
+*Instructions for running tests to be added.*
+
+### Merge approval
+
+libcontainer maintainers use LGTM (looks good to me) in comments on the code review
+to indicate acceptance.
+
+A change requires LGTMs from at lease two maintainers. One of those must come from
+a maintainer of the component affected. For example, if a change affects `netlink/`
+and `security`, it needs at least one LGTM from a maintainer of each. Maintainers
+only need one LGTM as presumably they LGTM their own change.
+
+For more details see [MAINTAINERS.md](MAINTAINERS.md)
+
+### Sign your work
+
+The sign-off is a simple line at the end of the explanation for the
+patch, which certifies that you wrote it or otherwise have the right to
+pass it on as an open-source patch.  The rules are pretty simple: if you
+can certify the below (from
+[developercertificate.org](http://developercertificate.org/)):
+
+```
+Developer Certificate of Origin
+Version 1.1
+
+Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
+660 York Street, Suite 102,
+San Francisco, CA 94110 USA
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+
+Developer's Certificate of Origin 1.1
+
+By making a contribution to this project, I certify that:
+
+(a) The contribution was created in whole or in part by me and I
+    have the right to submit it under the open source license
+    indicated in the file; or
+
+(b) The contribution is based upon previous work that, to the best
+    of my knowledge, is covered under an appropriate open source
+    license and I have the right under that license to submit that
+    work with modifications, whether created in whole or in part
+    by me, under the same open source license (unless I am
+    permitted to submit under a different license), as indicated
+    in the file; or
+
+(c) The contribution was provided directly to me by some other
+    person who certified (a), (b) or (c) and I have not modified
+    it.
+
+(d) I understand and agree that this project and the contribution
+    are public and that a record of the contribution (including all
+    personal information I submit with it, including my sign-off) is
+    maintained indefinitely and may be redistributed consistent with
+    this project or the open source license(s) involved.
+```
+
+then you just add a line to every git commit message:
+
+    Docker-DCO-1.1-Signed-off-by: Joe Smith <joe.smith@email.com> (github: github_handle)
+
+using your real name (sorry, no pseudonyms or anonymous contributions.)
+
+One way to automate this, is customise your get ``commit.template`` by adding
+a ``prepare-commit-msg`` hook to your libcontainer checkout:
+
+```
+curl -o .git/hooks/prepare-commit-msg https://raw.githubusercontent.com/docker/docker/master/contrib/prepare-commit-msg.hook && chmod +x .git/hooks/prepare-commit-msg
+```
+
+* Note: the above script expects to find your GitHub user name in ``git config --get github.user``
+
+#### Small patch exception
+
+There are several exceptions to the signing requirement. Currently these are:
+
+* Your patch fixes spelling or grammar errors.
+* Your patch is a single line change to documentation contained in the
+  `docs` directory.
+* Your patch fixes Markdown formatting or syntax errors in the
+  documentation contained in the `docs` directory.
+
+If you have any questions, please refer to the FAQ in the [docs](to be written)
+
+### How can I become a maintainer?
+
+* Step 1: learn the component inside out
+* Step 2: make yourself useful by contributing code, bugfixes, support etc.
+* Step 3: volunteer on the irc channel (#libcontainer@freenode)
+
+Don't forget: being a maintainer is a time investment. Make sure you will have time to make yourself available.
+You don't have to be a maintainer to make a difference on the project!
+

Godeps/_workspace/src/github.com/docker/libcontainer/Dockerfile

+FROM golang:1.4
+
+RUN go get golang.org/x/tools/cmd/cover
+
+ENV GOPATH $GOPATH:/go/src/github.com/docker/libcontainer/vendor
+RUN go get github.com/docker/docker/pkg/term
+
+# setup a playground for us to spawn containers in
+RUN mkdir /busybox && \
+    curl -sSL 'https://github.com/jpetazzo/docker-busybox/raw/buildroot-2014.02/rootfs.tar' | tar -xC /busybox
+
+RUN curl -sSL https://raw.githubusercontent.com/docker/docker/master/project/dind -o /dind && \
+    chmod +x /dind
+
+COPY . /go/src/github.com/docker/libcontainer
+WORKDIR /go/src/github.com/docker/libcontainer
+RUN cp sample_configs/minimal.json /busybox/container.json
+
+RUN go get -d -v ./...
+RUN make direct-install
+
+ENTRYPOINT ["/dind"]
+CMD ["make", "direct-test"]

Godeps/_workspace/src/github.com/docker/libcontainer/MAINTAINERS

+Michael Crosby <michael@docker.com> (@crosbymichael)
+Rohit Jnagal <jnagal@google.com> (@rjnagal)
+Victor Marmol <vmarmol@google.com> (@vmarmol)
+Mrunal Patel <mpatel@redhat.com> (@mrunalp)
+Alexandr Morozov <lk4d4@docker.com> (@LK4D4)
+update-vendor.sh: Tianon Gravi <admwiggin@gmail.com> (@tianon)

Godeps/_workspace/src/github.com/docker/libcontainer/MAINTAINERS_GUIDE.md

+# The libcontainer Maintainers' Guide
+
+## Introduction
+
+Dear maintainer. Thank you for investing the time and energy to help
+make libcontainer as useful as possible. Maintaining a project is difficult,
+sometimes unrewarding work.  Sure, you will get to contribute cool
+features to the project. But most of your time will be spent reviewing,
+cleaning up, documenting, answering questions, justifying design
+decisions - while everyone has all the fun! But remember - the quality
+of the maintainers work is what distinguishes the good projects from the
+great.  So please be proud of your work, even the unglamourous parts,
+and encourage a culture of appreciation and respect for *every* aspect
+of improving the project - not just the hot new features.
+
+This document is a manual for maintainers old and new. It explains what
+is expected of maintainers, how they should work, and what tools are
+available to them.
+
+This is a living document - if you see something out of date or missing,
+speak up!
+
+## What are a maintainer's responsibility?
+
+It is every maintainer's responsibility to:
+
+* 1) Expose a clear roadmap for improving their component.
+* 2) Deliver prompt feedback and decisions on pull requests.
+* 3) Be available to anyone with questions, bug reports, criticism etc.
+  on their component. This includes IRC, GitHub requests and the mailing
+  list.
+* 4) Make sure their component respects the philosophy, design and
+  roadmap of the project.
+
+## How are decisions made?
+
+Short answer: with pull requests to the libcontainer repository.
+
+libcontainer is an open-source project with an open design philosophy. This
+means that the repository is the source of truth for EVERY aspect of the
+project, including its philosophy, design, roadmap and APIs. *If it's
+part of the project, it's in the repo. It's in the repo, it's part of
+the project.*
+
+As a result, all decisions can be expressed as changes to the
+repository. An implementation change is a change to the source code. An
+API change is a change to the API specification. A philosophy change is
+a change to the philosophy manifesto. And so on.
+
+All decisions affecting libcontainer, big and small, follow the same 3 steps:
+
+* Step 1: Open a pull request. Anyone can do this.
+
+* Step 2: Discuss the pull request. Anyone can do this.
+
+* Step 3: Accept (`LGTM`) or refuse a pull request. The relevant maintainers do 
+this (see below "Who decides what?")
+
+
+## Who decides what?
+
+All decisions are pull requests, and the relevant maintainers make
+decisions by accepting or refusing the pull request. Review and acceptance
+by anyone is denoted by adding a comment in the pull request: `LGTM`. 
+However, only currently listed `MAINTAINERS` are counted towards the required
+two LGTMs.
+
+libcontainer follows the timeless, highly efficient and totally unfair system
+known as [Benevolent dictator for life](http://en.wikipedia.org/wiki/Benevolent_Dictator_for_Life), with Michael Crosby in the role of BDFL.
+This means that all decisions are made by default by Michael. Since making
+every decision himself would be highly un-scalable, in practice decisions
+are spread across multiple maintainers.
+
+The relevant maintainers for a pull request can be worked out in two steps:
+
+* Step 1: Determine the subdirectories affected by the pull request. This
+  might be `netlink/` and `security/`, or any other part of the repo.
+
+* Step 2: Find the `MAINTAINERS` file which affects this directory. If the
+  directory itself does not have a `MAINTAINERS` file, work your way up
+  the repo hierarchy until you find one.
+
+### I'm a maintainer, and I'm going on holiday
+
+Please let your co-maintainers and other contributors know by raising a pull
+request that comments out your `MAINTAINERS` file entry using a `#`.
+
+### I'm a maintainer, should I make pull requests too?
+
+Yes. Nobody should ever push to master directly. All changes should be
+made through a pull request.
+
+### Who assigns maintainers?
+
+Michael has final `LGTM` approval for all pull requests to `MAINTAINERS` files.
+
+### How is this process changed?
+
+Just like everything else: by making a pull request :)

Godeps/_workspace/src/github.com/docker/libcontainer/Makefile

+
+all:
+	docker build -t dockercore/libcontainer .
+
+test: 
+	# we need NET_ADMIN for the netlink tests and SYS_ADMIN for mounting
+	docker run --rm -it --privileged dockercore/libcontainer
+
+sh:
+	docker run --rm -it --privileged -w /busybox dockercore/libcontainer nsinit exec sh
+
+GO_PACKAGES = $(shell find . -not \( -wholename ./vendor -prune -o -wholename ./.git -prune \) -name '*.go' -print0 | xargs -0n1 dirname | sort -u)
+
+direct-test:
+	go test $(TEST_TAGS) -cover -v $(GO_PACKAGES)
+
+direct-test-short:
+	go test $(TEST_TAGS) -cover -test.short -v $(GO_PACKAGES)
+
+direct-build:
+	go build -v $(GO_PACKAGES)
+
+direct-install:
+	go install -v $(GO_PACKAGES)

Godeps/_workspace/src/github.com/docker/libcontainer/NOTICE

+libcontainer
+Copyright 2012-2014 Docker, Inc.
+
+This product includes software developed at Docker, Inc. (http://www.docker.com).
+
+The following is courtesy of our legal counsel:
+
+
+Use and transfer of Docker may be subject to certain restrictions by the
+United States and other governments.  
+It is your responsibility to ensure that your use and/or transfer does not
+violate applicable laws. 
+
+For more information, please see http://www.bis.doc.gov
+
+See also http://www.apache.org/dev/crypto.html and/or seek legal counsel.

Godeps/_workspace/src/github.com/docker/libcontainer/PRINCIPLES.md

+# libcontainer Principles
+
+In the design and development of libcontainer we try to follow these principles:
+
+(Work in progress)
+
+* Don't try to replace every tool. Instead, be an ingredient to improve them.
+* Less code is better.
+* Fewer components are better. Do you really need to add one more class?
+* 50 lines of straightforward, readable code is better than 10 lines of magic that nobody can understand.
+* Don't do later what you can do now. "//FIXME: refactor" is not acceptable in new code.
+* When hesitating between two options, choose the one that is easier to reverse.
+* "No" is temporary; "Yes" is forever. If you're not sure about a new feature, say no. You can change your mind later.
+* Containers must be portable to the greatest possible number of machines. Be suspicious of any change which makes machines less interchangeable.
+* The fewer moving parts in a container, the better.
+* Don't merge it unless you document it.
+* Don't document it unless you can keep it up-to-date.
+* Don't merge it unless you test it!
+* Everyone's problem is slightly different. Focus on the part that is the same for everyone, and solve that.

Godeps/_workspace/src/github.com/docker/libcontainer/README.md

+## libcontainer - reference implementation for containers [![Build Status](https://ci.dockerproject.com/github.com/docker/libcontainer/status.svg?branch=master)](https://ci.dockerproject.com/github.com/docker/libcontainer) 
+
+### Note on API changes:
+
+Please bear with us while we work on making the libcontainer API stable and something that we can support long term.  We are currently discussing the API with the community, therefore, if you currently depend on libcontainer please pin your dependency at a specific tag or commit id.  Please join the discussion and help shape the API.
+
+#### Background
+
+libcontainer specifies configuration options for what a container is.  It provides a native Go implementation for using Linux namespaces with no external dependencies.  libcontainer provides many convenience functions for working with namespaces, networking, and management.  
+
+
+#### Container
+A container is a self contained execution environment that shares the kernel of the host system and which is (optionally) isolated from other containers in the system.
+
+libcontainer may be used to execute a process in a container. If a user tries to run a new process inside an existing container, the new process is added to the processes executing in the container.
+
+
+#### Root file system
+
+A container runs with a directory known as its *root file system*, or *rootfs*, mounted as the file system root. The rootfs is usually a full system tree.
+
+
+#### Configuration
+
+A container is initially configured by supplying configuration data when the container is created.
+
+
+#### nsinit
+
+`nsinit` is a cli application which demonstrates the use of libcontainer.  It is able to spawn new containers or join existing containers, based on the current directory.
+
+To use `nsinit`, cd into a Linux rootfs and copy a `container.json` file into the directory with your specified configuration. Environment, networking, and different capabilities for the container are specified in this file. The configuration is used for each process executed inside the container.
+                                                                                                                               
+See the `sample_configs` folder for examples of what the container configuration should look like.
+
+To execute `/bin/bash` in the current directory as a container just run the following **as root**:
+```bash
+nsinit exec /bin/bash
+```
+
+If you wish to spawn another process inside the container while your current bash session is running, run the same command again to get another bash shell (or change the command).  If the original process (PID 1) dies, all other processes spawned inside the container will be killed and the namespace will be removed. 
+
+You can identify if a process is running in a container by looking to see if `state.json` is in the root of the directory.
+   
+You may also specify an alternate root place where the `container.json` file is read and where the `state.json` file will be saved.
+
+#### Future
+See the [roadmap](ROADMAP.md).
+
+## Copyright and license
+
+Code and documentation copyright 2014 Docker, inc. Code released under the Apache 2.0 license.
+Docs released under Creative commons.
+
+## Hacking on libcontainer
+
+First of all, please familiarise yourself with the [libcontainer Principles](PRINCIPLES.md).
+
+If you're a *contributor* or aspiring contributor, you should read the [Contributors' Guide](CONTRIBUTING.md).
+
+If you're a *maintainer* or aspiring maintainer, you should read the [Maintainers' Guide](MAINTAINERS_GUIDE.md) and
+"How can I become a maintainer?" in the Contributors' Guide.

Godeps/_workspace/src/github.com/docker/libcontainer/ROADMAP.md

+# libcontainer: what's next?
+
+This document is a high-level overview of where we want to take libcontainer next.
+It is a curated selection of planned improvements which are either important, difficult, or both.
+
+For a more complete view of planned and requested improvements, see [the Github issues](https://github.com/docker/libcontainer/issues).
+
+To suggest changes to the roadmap, including additions, please write the change as if it were already in effect, and make a pull request.
+
+## Broader kernel support
+
+Our goal is to make libcontainer run everywhere, but currently libcontainer requires Linux version 3.8 or higher. If you’re deploying new machines for the purpose of running libcontainer, this is a fairly easy requirement to meet. However, if you’re adding libcontainer to an existing deployment, you may not have the flexibility to update and patch the kernel.
+
+## Cross-architecture support
+
+Our goal is to make libcontainer run everywhere. However currently libcontainer only runs on x86_64 systems. We plan on expanding architecture support, so that libcontainer containers can be created and used on more architectures.

Godeps/_workspace/src/github.com/docker/libcontainer/api_temp.go

+/*
+Temporary API endpoint for libcontainer while the full API is finalized (api.go).
+*/
+package libcontainer
+
+import (
+	"github.com/docker/libcontainer/cgroups/fs"
+	"github.com/docker/libcontainer/network"
+)
+
+// TODO(vmarmol): Complete Stats() in final libcontainer API and move users to that.
+// DEPRECATED: The below portions are only to be used during the transition to the official API.
+// Returns all available stats for the given container.
+func GetStats(container *Config, state *State) (stats *ContainerStats, err error) {
+	stats = &ContainerStats{}
+	if stats.CgroupStats, err = fs.GetStats(state.CgroupPaths); err != nil {
+		return stats, err
+	}
+	stats.NetworkStats, err = network.GetStats(&state.NetworkState)
+	return stats, err
+}

Godeps/_workspace/src/github.com/docker/libcontainer/apparmor/apparmor.go

+// +build apparmor,linux
+
+package apparmor
+
+// #cgo LDFLAGS: -lapparmor
+// #include <sys/apparmor.h>
+// #include <stdlib.h>
+import "C"
+import (
+	"io/ioutil"
+	"os"
+	"unsafe"
+)
+
+func IsEnabled() bool {
+	if _, err := os.Stat("/sys/kernel/security/apparmor"); err == nil && os.Getenv("container") == "" {
+		buf, err := ioutil.ReadFile("/sys/module/apparmor/parameters/enabled")
+		return err == nil && len(buf) > 1 && buf[0] == 'Y'
+	}
+	return false
+}
+
+func ApplyProfile(name string) error {
+	if name == "" {
+		return nil
+	}
+
+	cName := C.CString(name)
+	defer C.free(unsafe.Pointer(cName))
+
+	if _, err := C.aa_change_onexec(cName); err != nil {
+		return err
+	}
+	return nil
+}

Godeps/_workspace/src/github.com/docker/libcontainer/apparmor/apparmor_disabled.go

+// +build !apparmor !linux
+
+package apparmor
+
+func IsEnabled() bool {
+	return false
+}
+
+func ApplyProfile(name string) error {
+	return nil
+}

Godeps/_workspace/src/github.com/docker/libcontainer/apparmor/gen.go

+package apparmor
+
+import (
+	"io"
+	"os"
+	"text/template"
+)
+
+type data struct {
+	Name         string
+	Imports      []string
+	InnerImports []string
+}
+
+const baseTemplate = `
+{{range $value := .Imports}}
+{{$value}}
+{{end}}
+
+profile {{.Name}} flags=(attach_disconnected,mediate_deleted) {
+{{range $value := .InnerImports}}
+  {{$value}}
+{{end}}
+
+  network,
+  capability,
+  file,
+  umount,
+
+  mount fstype=tmpfs,
+  mount fstype=mqueue,
+  mount fstype=fuse.*,
+  mount fstype=binfmt_misc -> /proc/sys/fs/binfmt_misc/,
+  mount fstype=efivarfs -> /sys/firmware/efi/efivars/,
+  mount fstype=fusectl -> /sys/fs/fuse/connections/,
+  mount fstype=securityfs -> /sys/kernel/security/,
+  mount fstype=debugfs -> /sys/kernel/debug/,
+  mount fstype=proc -> /proc/,
+  mount fstype=sysfs -> /sys/,
+
+  deny @{PROC}/sys/fs/** wklx,
+  deny @{PROC}/sysrq-trigger rwklx,
+  deny @{PROC}/mem rwklx,
+  deny @{PROC}/kmem rwklx,
+  deny @{PROC}/sys/kernel/[^s][^h][^m]* wklx,
+  deny @{PROC}/sys/kernel/*/** wklx,
+
+  deny mount options=(ro, remount) -> /,
+  deny mount fstype=debugfs -> /var/lib/ureadahead/debugfs/,
+  deny mount fstype=devpts,
+
+  deny /sys/[^f]*/** wklx,
+  deny /sys/f[^s]*/** wklx,
+  deny /sys/fs/[^c]*/** wklx,
+  deny /sys/fs/c[^g]*/** wklx,
+  deny /sys/fs/cg[^r]*/** wklx,
+  deny /sys/firmware/efi/efivars/** rwklx,
+  deny /sys/kernel/security/** rwklx,
+}
+`
+
+func generateProfile(out io.Writer) error {
+	compiled, err := template.New("apparmor_profile").Parse(baseTemplate)
+	if err != nil {
+		return err
+	}
+	data := &data{
+		Name: "docker-default",
+	}
+	if tuntablesExists() {
+		data.Imports = append(data.Imports, "#include <tunables/global>")
+	} else {
+		data.Imports = append(data.Imports, "@{PROC}=/proc/")
+	}
+	if abstrctionsEsists() {
+		data.InnerImports = append(data.InnerImports, "#include <abstractions/base>")
+	}
+	if err := compiled.Execute(out, data); err != nil {
+		return err
+	}
+	return nil
+}
+
+// check if the tunables/global exist
+func tuntablesExists() bool {
+	_, err := os.Stat("/etc/apparmor.d/tunables/global")
+	return err == nil
+}
+
+// check if abstractions/base exist
+func abstrctionsEsists() bool {
+	_, err := os.Stat("/etc/apparmor.d/abstractions/base")
+	return err == nil
+}

Godeps/_workspace/src/github.com/docker/libcontainer/apparmor/setup.go

+package apparmor
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path"
+)
+
+const (
+	DefaultProfilePath = "/etc/apparmor.d/docker"
+)
+
+func InstallDefaultProfile() error {
+	if !IsEnabled() {
+		return nil
+	}
+
+	// Make sure /etc/apparmor.d exists
+	if err := os.MkdirAll(path.Dir(DefaultProfilePath), 0755); err != nil {
+		return err
+	}
+
+	f, err := os.OpenFile(DefaultProfilePath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
+	if err != nil {
+		return err
+	}
+	if err := generateProfile(f); err != nil {
+		f.Close()
+		return err
+	}
+	f.Close()
+
+	cmd := exec.Command("/sbin/apparmor_parser", "-r", "-W", "docker")
+	// to use the parser directly we have to make sure we are in the correct
+	// dir with the profile
+	cmd.Dir = "/etc/apparmor.d"
+
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("Error loading docker apparmor profile: %s (%s)", err, output)
+	}
+	return nil
+}

Godeps/_workspace/src/github.com/docker/libcontainer/cgroups/cgroups.go

+package cgroups
+
+import (
+	"fmt"
+
+	"github.com/docker/libcontainer/devices"
+)
+
+type FreezerState string
+
+const (
+	Undefined FreezerState = ""
+	Frozen    FreezerState = "FROZEN"
+	Thawed    FreezerState = "THAWED"
+)
+
+type NotFoundError struct {
+	Subsystem string
+}
+
+func (e *NotFoundError) Error() string {
+	return fmt.Sprintf("mountpoint for %s not found", e.Subsystem)
+}
+
+func NewNotFoundError(sub string) error {
+	return &NotFoundError{
+		Subsystem: sub,
+	}
+}
+
+func IsNotFound(err error) bool {
+	if err == nil {
+		return false
+	}
+
+	_, ok := err.(*NotFoundError)
+	return ok
+}
+
+type Cgroup struct {
+	Name   string `json:"name,omitempty"`
+	Parent string `json:"parent,omitempty"` // name of parent cgroup or slice
+
+	AllowAllDevices   bool              `json:"allow_all_devices,omitempty"` // If this is true allow access to any kind of device within the container.  If false, allow access only to devices explicitly listed in the allowed_devices list.
+	AllowedDevices    []*devices.Device `json:"allowed_devices,omitempty"`
+	Memory            int64             `json:"memory,omitempty"`             // Memory limit (in bytes)
+	MemoryReservation int64             `json:"memory_reservation,omitempty"` // Memory reservation or soft_limit (in bytes)
+	MemorySwap        int64             `json:"memory_swap,omitempty"`        // Total memory usage (memory + swap); set `-1' to disable swap
+	CpuShares         int64             `json:"cpu_shares,omitempty"`         // CPU shares (relative weight vs. other containers)
+	CpuQuota          int64             `json:"cpu_quota,omitempty"`          // CPU hardcap limit (in usecs). Allowed cpu time in a given period.
+	CpuPeriod         int64             `json:"cpu_period,omitempty"`         // CPU period to be used for hardcapping (in usecs). 0 to use system default.
+	CpusetCpus        string            `json:"cpuset_cpus,omitempty"`        // CPU to use
+	CpusetMems        string            `json:"cpuset_mems,omitempty"`        // MEM to use
+	Freezer           FreezerState      `json:"freezer,omitempty"`            // set the freeze value for the process
+	Slice             string            `json:"slice,omitempty"`              // Parent slice to use for systemd
+}

Godeps/_workspace/src/github.com/docker/libcontainer/cgroups/cgroups_test.go

+package cgroups
+
+import (
+	"bytes"
+	"testing"
+)
+
+const (
+	cgroupsContents = `11:hugetlb:/
+10:perf_event:/
+9:blkio:/
+8:net_cls:/
+7:freezer:/
+6:devices:/
+5:memory:/
+4:cpuacct,cpu:/
+3:cpuset:/
+2:name=systemd:/user.slice/user-1000.slice/session-16.scope`
+)
+
+func TestParseCgroups(t *testing.T) {
+	r := bytes.NewBuffer([]byte(cgroupsContents))
+	_, err := ParseCgroupFile("blkio", r)
+	if err != nil {
+		t.Fatal(err)
+	}
+}

Godeps/_workspace/src/github.com/docker/libcontainer/cgroups/fs/apply_raw.go

+package fs
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strconv"
+
+	"github.com/docker/libcontainer/cgroups"
+)
+
+var (
+	subsystems = map[string]subsystem{
+		"devices":    &DevicesGroup{},
+		"memory":     &MemoryGroup{},
+		"cpu":        &CpuGroup{},
+		"cpuset":     &CpusetGroup{},
+		"cpuacct":    &CpuacctGroup{},
+		"blkio":      &BlkioGroup{},
+		"perf_event": &PerfEventGroup{},
+		"freezer":    &FreezerGroup{},
+	}
+	CgroupProcesses = "cgroup.procs"
+)
+
+// The absolute path to the root of the cgroup hierarchies.
+var cgroupRoot string
+
+// TODO(vmarmol): Report error here, we'll probably need to wait for the new API.
+func init() {
+	// we can pick any subsystem to find the root
+	cpuRoot, err := cgroups.FindCgroupMountpoint("cpu")
+	if err != nil {
+		return
+	}
+	cgroupRoot = filepath.Dir(cpuRoot)
+
+	if _, err := os.Stat(cgroupRoot); err != nil {
+		return
+	}
+}
+
+type subsystem interface {
+	// Returns the stats, as 'stats', corresponding to the cgroup under 'path'.
+	GetStats(path string, stats *cgroups.Stats) error
+	// Removes the cgroup represented by 'data'.
+	Remove(*data) error
+	// Creates and joins the cgroup represented by data.
+	Set(*data) error
+}
+
+type data struct {
+	root   string
+	cgroup string
+	c      *cgroups.Cgroup
+	pid    int
+}
+
+func Apply(c *cgroups.Cgroup, pid int) (map[string]string, error) {
+	d, err := getCgroupData(c, pid)
+	if err != nil {
+		return nil, err
+	}
+
+	paths := make(map[string]string)
+	defer func() {
+		if err != nil {
+			cgroups.RemovePaths(paths)
+		}
+	}()
+	for name, sys := range subsystems {
+		if err := sys.Set(d); err != nil {
+			return nil, err
+		}
+		// FIXME: Apply should, ideally, be reentrant or be broken up into a separate
+		// create and join phase so that the cgroup hierarchy for a container can be
+		// created then join consists of writing the process pids to cgroup.procs
+		p, err := d.path(name)
+		if err != nil {
+			if cgroups.IsNotFound(err) {
+				continue
+			}
+			return nil, err
+		}
+		paths[name] = p
+	}
+	return paths, nil
+}
+
+// Symmetrical public function to update device based cgroups.  Also available
+// in the systemd implementation.
+func ApplyDevices(c *cgroups.Cgroup, pid int) error {
+	d, err := getCgroupData(c, pid)
+	if err != nil {
+		return err
+	}
+
+	devices := subsystems["devices"]
+
+	return devices.Set(d)
+}
+
+func GetStats(systemPaths map[string]string) (*cgroups.Stats, error) {
+	stats := cgroups.NewStats()
+	for name, path := range systemPaths {
+		sys, ok := subsystems[name]
+		if !ok || !cgroups.PathExists(path) {
+			continue
+		}
+		if err := sys.GetStats(path, stats); err != nil {
+			return nil, err
+		}
+	}
+
+	return stats, nil
+}
+
+// Freeze toggles the container's freezer cgroup depending on the state
+// provided
+func Freeze(c *cgroups.Cgroup, state cgroups.FreezerState) error {
+	d, err := getCgroupData(c, 0)
+	if err != nil {
+		return err
+	}
+
+	c.Freezer = state
+
+	freezer := subsystems["freezer"]
+
+	return freezer.Set(d)
+}
+
+func GetPids(c *cgroups.Cgroup) ([]int, error) {
+	d, err := getCgroupData(c, 0)
+	if err != nil {
+		return nil, err
+	}
+
+	dir, err := d.path("devices")
+	if err != nil {
+		return nil, err
+	}
+
+	return cgroups.ReadProcsFile(dir)
+}
+
+func getCgroupData(c *cgroups.Cgroup, pid int) (*data, error) {
+	if cgroupRoot == "" {
+		return nil, fmt.Errorf("failed to find the cgroup root")
+	}
+
+	cgroup := c.Name
+	if c.Parent != "" {
+		cgroup = filepath.Join(c.Parent, cgroup)
+	}
+
+	return &data{
+		root:   cgroupRoot,
+		cgroup: cgroup,
+		c:      c,
+		pid:    pid,
+	}, nil
+}
+
+func (raw *data) parent(subsystem string) (string, error) {
+	initPath, err := cgroups.GetInitCgroupDir(subsystem)
+	if err != nil {
+		return "", err
+	}
+	return filepath.Join(raw.root, subsystem, initPath), nil
+}
+
+func (raw *data) path(subsystem string) (string, error) {
+	// If the cgroup name/path is absolute do not look relative to the cgroup of the init process.
+	if filepath.IsAbs(raw.cgroup) {
+		path := filepath.Join(raw.root, subsystem, raw.cgroup)
+
+		if _, err := os.Stat(path); err != nil {
+			if os.IsNotExist(err) {
+				return "", cgroups.NewNotFoundError(subsystem)
+			}
+
+			return "", err
+		}
+
+		return path, nil
+	}
+
+	parent, err := raw.parent(subsystem)
+	if err != nil {
+		return "", err
+	}
+
+	return filepath.Join(parent, raw.cgroup), nil
+}
+
+func (raw *data) join(subsystem string) (string, error) {
+	path, err := raw.path(subsystem)
+	if err != nil {
+		return "", err
+	}
+	if err := os.MkdirAll(path, 0755); err != nil && !os.IsExist(err) {
+		return "", err
+	}
+	if err := writeFile(path, CgroupProcesses, strconv.Itoa(raw.pid)); err != nil {
+		return "", err
+	}
+	return path, nil
+}
+
+func writeFile(dir, file, data string) error {
+	return ioutil.WriteFile(filepath.Join(dir, file), []byte(data), 0700)
+}
+
+func readFile(dir, file string) (string, error) {
+	data, err := ioutil.ReadFile(filepath.Join(dir, file))
+	return string(data), err
+}
+
+func removePath(p string, err error) error {
+	if err != nil {
+		return err
+	}
+	if p != "" {
+		return os.RemoveAll(p)
+	}
+	return nil
+}

Godeps/_workspace/src/github.com/docker/libcontainer/cgroups/fs/blkio.go

+package fs
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+
+	"github.com/docker/libcontainer/cgroups"
+)
+
+type BlkioGroup struct {
+}
+
+func (s *BlkioGroup) Set(d *data) error {
+	// we just want to join this group even though we don't set anything
+	if _, err := d.join("blkio"); err != nil && !cgroups.IsNotFound(err) {
+		return err
+	}
+
+	return nil
+}
+
+func (s *BlkioGroup) Remove(d *data) error {
+	return removePath(d.path("blkio"))
+}
+
+/*
+examples:
+
+    blkio.sectors
+    8:0 6792
+
+    blkio.io_service_bytes
+    8:0 Read 1282048
+    8:0 Write 2195456
+    8:0 Sync 2195456
+    8:0 Async 1282048
+    8:0 Total 3477504
+    Total 3477504
+
+    blkio.io_serviced
+    8:0 Read 124
+    8:0 Write 104
+    8:0 Sync 104
+    8:0 Async 124
+    8:0 Total 228
+    Total 228
+
+    blkio.io_queued
+    8:0 Read 0
+    8:0 Write 0
+    8:0 Sync 0
+    8:0 Async 0
+    8:0 Total 0
+    Total 0
+*/
+
+func splitBlkioStatLine(r rune) bool {
+	return r == ' ' || r == ':'
+}
+
+func getBlkioStat(path string) ([]cgroups.BlkioStatEntry, error) {
+	var blkioStats []cgroups.BlkioStatEntry
+	f, err := os.Open(path)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return blkioStats, nil
+		}
+		return nil, err
+	}
+	defer f.Close()
+
+	sc := bufio.NewScanner(f)
+	for sc.Scan() {
+		// format: dev type amount
+		fields := strings.FieldsFunc(sc.Text(), splitBlkioStatLine)
+		if len(fields) < 3 {
+			if len(fields) == 2 && fields[0] == "Total" {
+				// skip total line
+				continue
+			} else {
+				return nil, fmt.Errorf("Invalid line found while parsing %s: %s", path, sc.Text())
+			}
+		}
+
+		v, err := strconv.ParseUint(fields[0], 10, 64)
+		if err != nil {
+			return nil, err
+		}
+		major := v
+
+		v, err = strconv.ParseUint(fields[1], 10, 64)
+		if err != nil {
+			return nil, err
+		}
+		minor := v
+
+		op := ""
+		valueField := 2
+		if len(fields) == 4 {
+			op = fields[2]
+			valueField = 3
+		}
+		v, err = strconv.ParseUint(fields[valueField], 10, 64)
+		if err != nil {
+			return nil, err
+		}
+		blkioStats = append(blkioStats, cgroups.BlkioStatEntry{Major: major, Minor: minor, Op: op, Value: v})
+	}
+
+	return blkioStats, nil
+}
+
+func (s *BlkioGroup) GetStats(path string, stats *cgroups.Stats) error {
+	// Try to read CFQ stats available on all CFQ enabled kernels first
+	if blkioStats, err := getBlkioStat(filepath.Join(path, "blkio.io_serviced_recursive")); err == nil && blkioStats != nil {
+		return getCFQStats(path, stats)
+	}
+	return getStats(path, stats) // Use generic stats as fallback
+}
+
+func getCFQStats(path string, stats *cgroups.Stats) error {
+	var blkioStats []cgroups.BlkioStatEntry
+	var err error
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.sectors_recursive")); err != nil {
+		return err
+	}
+	stats.BlkioStats.SectorsRecursive = blkioStats
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.io_service_bytes_recursive")); err != nil {
+		return err
+	}
+	stats.BlkioStats.IoServiceBytesRecursive = blkioStats
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.io_serviced_recursive")); err != nil {
+		return err
+	}
+	stats.BlkioStats.IoServicedRecursive = blkioStats
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.io_queued_recursive")); err != nil {
+		return err
+	}
+	stats.BlkioStats.IoQueuedRecursive = blkioStats
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.io_service_time_recursive")); err != nil {
+		return err
+	}
+	stats.BlkioStats.IoServiceTimeRecursive = blkioStats
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.io_wait_time_recursive")); err != nil {
+		return err
+	}
+	stats.BlkioStats.IoWaitTimeRecursive = blkioStats
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.io_merged_recursive")); err != nil {
+		return err
+	}
+	stats.BlkioStats.IoMergedRecursive = blkioStats
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.time_recursive")); err != nil {
+		return err
+	}
+	stats.BlkioStats.IoTimeRecursive = blkioStats
+
+	return nil
+}
+
+func getStats(path string, stats *cgroups.Stats) error {
+	var blkioStats []cgroups.BlkioStatEntry
+	var err error
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.throttle.io_service_bytes")); err != nil {
+		return err
+	}
+	stats.BlkioStats.IoServiceBytesRecursive = blkioStats
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.throttle.io_serviced")); err != nil {
+		return err
+	}
+	stats.BlkioStats.IoServicedRecursive = blkioStats
+
+	return nil
+}

Godeps/_workspace/src/github.com/docker/libcontainer/cgroups/fs/cpu.go

+package fs
+
+import (
+	"bufio"
+	"os"
+	"path/filepath"
+	"strconv"
+
+	"github.com/docker/libcontainer/cgroups"
+)
+
+type CpuGroup struct {
+}
+
+func (s *CpuGroup) Set(d *data) error {
+	// We always want to join the cpu group, to allow fair cpu scheduling
+	// on a container basis
+	dir, err := d.join("cpu")
+	if err != nil {
+		return err
+	}
+	if d.c.CpuShares != 0 {
+		if err := writeFile(dir, "cpu.shares", strconv.FormatInt(d.c.CpuShares, 10)); err != nil {
+			return err
+		}
+	}
+	if d.c.CpuPeriod != 0 {
+		if err := writeFile(dir, "cpu.cfs_period_us", strconv.FormatInt(d.c.CpuPeriod, 10)); err != nil {
+			return err
+		}
+	}
+	if d.c.CpuQuota != 0 {
+		if err := writeFile(dir, "cpu.cfs_quota_us", strconv.FormatInt(d.c.CpuQuota, 10)); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (s *CpuGroup) Remove(d *data) error {
+	return removePath(d.path("cpu"))
+}
+
+func (s *CpuGroup) GetStats(path string, stats *cgroups.Stats) error {
+	f, err := os.Open(filepath.Join(path, "cpu.stat"))
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
+		return err
+	}
+	defer f.Close()
+
+	sc := bufio.NewScanner(f)
+	for sc.Scan() {
+		t, v, err := getCgroupParamKeyValue(sc.Text())
+		if err != nil {
+			return err
+		}
+		switch t {
+		case "nr_periods":
+			stats.CpuStats.ThrottlingData.Periods = v
+
+		case "nr_throttled":
+			stats.CpuStats.ThrottlingData.ThrottledPeriods = v
+
+		case "throttled_time":
+			stats.CpuStats.ThrottlingData.ThrottledTime = v
+		}
+	}
+	return nil
+}

Godeps/_workspace/src/github.com/docker/libcontainer/cgroups/fs/cpu_test.go

+package fs
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/docker/libcontainer/cgroups"
+)
+
+func TestCpuStats(t *testing.T) {
+	helper := NewCgroupTestUtil("cpu", t)
+	defer helper.cleanup()
+
+	const (
+		kNrPeriods     = 2000
+		kNrThrottled   = 200
+		kThrottledTime = uint64(18446744073709551615)
+	)
+
+	cpuStatContent := fmt.Sprintf("nr_periods %d\n nr_throttled %d\n throttled_time %d\n",
+		kNrPeriods, kNrThrottled, kThrottledTime)
+	helper.writeFileContents(map[string]string{
+		"cpu.stat": cpuStatContent,
+	})
+
+	cpu := &CpuGroup{}
+	actualStats := *cgroups.NewStats()
+	err := cpu.GetStats(helper.CgroupPath, &actualStats)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	expectedStats := cgroups.ThrottlingData{
+		Periods:          kNrPeriods,
+		ThrottledPeriods: kNrThrottled,
+		ThrottledTime:    kThrottledTime}
+
+	expectThrottlingDataEquals(t, expectedStats, actualStats.CpuStats.ThrottlingData)
+}
+
+func TestNoCpuStatFile(t *testing.T) {
+	helper := NewCgroupTestUtil("cpu", t)
+	defer helper.cleanup()
+
+	cpu := &CpuGroup{}
+	actualStats := *cgroups.NewStats()
+	err := cpu.GetStats(helper.CgroupPath, &actualStats)
+	if err != nil {
+		t.Fatal("Expected not to fail, but did")
+	}
+}
+
+func TestInvalidCpuStat(t *testing.T) {
+	helper := NewCgroupTestUtil("cpu", t)
+	defer helper.cleanup()
+	cpuStatContent := `nr_periods 2000
+	nr_throttled 200
+	throttled_time fortytwo`
+	helper.writeFileContents(map[string]string{
+		"cpu.stat": cpuStatContent,
+	})
+
+	cpu := &CpuGroup{}
+	actualStats := *cgroups.NewStats()
+	err := cpu.GetStats(helper.CgroupPath, &actualStats)
+	if err == nil {
+		t.Fatal("Expected failed stat parsing.")
+	}
+}

Godeps/_workspace/src/github.com/docker/libcontainer/cgroups/fs/cpuacct.go

+package fs
+
+import (
+	"fmt"
+	"io/ioutil"
+	"path/filepath"
+	"strconv"
+	"strings"
+
+	"github.com/docker/libcontainer/cgroups"
+	"github.com/docker/libcontainer/system"
+)
+
+const (
+	cgroupCpuacctStat   = "cpuacct.stat"
+	nanosecondsInSecond = 1000000000
+)
+
+var clockTicks = uint64(system.GetClockTicks())
+
+type CpuacctGroup struct {
+}
+
+func (s *CpuacctGroup) Set(d *data) error {
+	// we just want to join this group even though we don't set anything
+	if _, err := d.join("cpuacct"); err != nil && !cgroups.IsNotFound(err) {
+		return err
+	}
+
+	return nil
+}
+
+func (s *CpuacctGroup) Remove(d *data) error {
+	return removePath(d.path("cpuacct"))
+}
+
+func (s *CpuacctGroup) GetStats(path string, stats *cgroups.Stats) error {
+	userModeUsage, kernelModeUsage, err := getCpuUsageBreakdown(path)
+	if err != nil {
+		return err
+	}
+
+	totalUsage, err := getCgroupParamUint(path, "cpuacct.usage")
+	if err != nil {
+		return err
+	}
+
+	percpuUsage, err := getPercpuUsage(path)
+	if err != nil {
+		return err
+	}
+
+	stats.CpuStats.CpuUsage.TotalUsage = totalUsage
+	stats.CpuStats.CpuUsage.PercpuUsage = percpuUsage
+	stats.CpuStats.CpuUsage.UsageInUsermode = userModeUsage
+	stats.CpuStats.CpuUsage.UsageInKernelmode = kernelModeUsage
+	return nil
+}
+
+// Returns user and kernel usage breakdown in nanoseconds.
+func getCpuUsageBreakdown(path string) (uint64, uint64, error) {
+	userModeUsage := uint64(0)
+	kernelModeUsage := uint64(0)
+	const (
+		userField   = "user"
+		systemField = "system"
+	)
+
+	// Expected format:
+	// user <usage in ticks>
+	// system <usage in ticks>
+	data, err := ioutil.ReadFile(filepath.Join(path, cgroupCpuacctStat))
+	if err != nil {
+		return 0, 0, err
+	}
+	fields := strings.Fields(string(data))
+	if len(fields) != 4 {
+		return 0, 0, fmt.Errorf("failure - %s is expected to have 4 fields", filepath.Join(path, cgroupCpuacctStat))
+	}
+	if fields[0] != userField {
+		return 0, 0, fmt.Errorf("unexpected field %q in %q, expected %q", fields[0], cgroupCpuacctStat, userField)
+	}
+	if fields[2] != systemField {
+		return 0, 0, fmt.Errorf("unexpected field %q in %q, expected %q", fields[2], cgroupCpuacctStat, systemField)
+	}
+	if userModeUsage, err = strconv.ParseUint(fields[1], 10, 64); err != nil {
+		return 0, 0, err
+	}
+	if kernelModeUsage, err = strconv.ParseUint(fields[3], 10, 64); err != nil {
+		return 0, 0, err
+	}
+
+	return (userModeUsage * nanosecondsInSecond) / clockTicks, (kernelModeUsage * nanosecondsInSecond) / clockTicks, nil
+}
+
+func getPercpuUsage(path string) ([]uint64, error) {
+	percpuUsage := []uint64{}
+	data, err := ioutil.ReadFile(filepath.Join(path, "cpuacct.usage_percpu"))
+	if err != nil {
+		return percpuUsage, err
+	}
+	for _, value := range strings.Fields(string(data)) {
+		value, err := strconv.ParseUint(value, 10, 64)
+		if err != nil {
+			return percpuUsage, fmt.Errorf("Unable to convert param value to uint64: %s", err)
+		}
+		percpuUsage = append(percpuUsage, value)
+	}
+	return percpuUsage, nil
+}

Godeps/_workspace/src/github.com/docker/libcontainer/cgroups/fs/cpuset.go

+package fs
+
+import (
+	"bytes"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strconv"
+
+	"github.com/docker/libcontainer/cgroups"
+)
+
+type CpusetGroup struct {
+}
+
+func (s *CpusetGroup) Set(d *data) error {
+	dir, err := d.path("cpuset")
+	if err != nil {
+		return err
+	}
+	return s.SetDir(dir, d.c.CpusetCpus, d.c.CpusetMems, d.pid)
+}
+
+func (s *CpusetGroup) Remove(d *data) error {
+	return removePath(d.path("cpuset"))
+}
+
+func (s *CpusetGroup) GetStats(path string, stats *cgroups.Stats) error {
+	return nil
+}
+
+func (s *CpusetGroup) SetDir(dir, cpus string, mems string, pid int) error {
+	if err := s.ensureParent(dir); err != nil {
+		return err
+	}
+
+	// because we are not using d.join we need to place the pid into the procs file
+	// unlike the other subsystems
+	if err := writeFile(dir, "cgroup.procs", strconv.Itoa(pid)); err != nil {
+		return err
+	}
+
+	// If we don't use --cpuset-xxx, the default value inherit from parent cgroup
+	// is set in s.ensureParent, otherwise, use the value we set
+	if cpus != "" {
+		if err := writeFile(dir, "cpuset.cpus", cpus); err != nil {
+			return err
+		}
+	}
+	if mems != "" {
+		if err := writeFile(dir, "cpuset.mems", mems); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (s *CpusetGroup) getSubsystemSettings(parent string) (cpus []byte, mems []byte, err error) {
+	if cpus, err = ioutil.ReadFile(filepath.Join(parent, "cpuset.cpus")); err != nil {
+		return
+	}
+	if mems, err = ioutil.ReadFile(filepath.Join(parent, "cpuset.mems")); err != nil {
+		return
+	}
+	return cpus, mems, nil
+}
+
+// ensureParent ensures that the parent directory of current is created
+// with the proper cpus and mems files copied from it's parent if the values
+// are a file with a new line char
+func (s *CpusetGroup) ensureParent(current string) error {
+	parent := filepath.Dir(current)
+
+	if _, err := os.Stat(parent); err != nil {
+		if !os.IsNotExist(err) {
+			return err
+		}
+
+		if err := s.ensureParent(parent); err != nil {
+			return err
+		}
+	}
+
+	if err := os.MkdirAll(current, 0755); err != nil && !os.IsExist(err) {
+		return err
+	}
+	return s.copyIfNeeded(current, parent)
+}
+
+// copyIfNeeded copies the cpuset.cpus and cpuset.mems from the parent
+// directory to the current directory if the file's contents are 0
+func (s *CpusetGroup) copyIfNeeded(current, parent string) error {
+	var (
+		err                      error
+		currentCpus, currentMems []byte
+		parentCpus, parentMems   []byte
+	)
+
+	if currentCpus, currentMems, err = s.getSubsystemSettings(current); err != nil {
+		return err
+	}
+	if parentCpus, parentMems, err = s.getSubsystemSettings(parent); err != nil {
+		return err
+	}
+
+	if s.isEmpty(currentCpus) {
+		if err := writeFile(current, "cpuset.cpus", string(parentCpus)); err != nil {
+			return err
+		}
+	}
+	if s.isEmpty(currentMems) {
+		if err := writeFile(current, "cpuset.mems", string(parentMems)); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (s *CpusetGroup) isEmpty(b []byte) bool {
+	return len(bytes.Trim(b, "\n")) == 0
+}

Godeps/_workspace/src/github.com/docker/libcontainer/cgroups/fs/devices.go

+package fs
+
+import "github.com/docker/libcontainer/cgroups"
+
+type DevicesGroup struct {
+}
+
+func (s *DevicesGroup) Set(d *data) error {
+	dir, err := d.join("devices")
+	if err != nil {
+		return err
+	}
+
+	if !d.c.AllowAllDevices {
+		if err := writeFile(dir, "devices.deny", "a"); err != nil {
+			return err
+		}
+
+		for _, dev := range d.c.AllowedDevices {
+			if err := writeFile(dir, "devices.allow", dev.GetCgroupAllowString()); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func (s *DevicesGroup) Remove(d *data) error {
+	return removePath(d.path("devices"))
+}
+
+func (s *DevicesGroup) GetStats(path string, stats *cgroups.Stats) error {
+	return nil
+}

Godeps/_workspace/src/github.com/docker/libcontainer/cgroups/fs/freezer.go

+package fs
+
+import (
+	"strings"
+	"time"
+
+	"github.com/docker/libcontainer/cgroups"
+)
+
+type FreezerGroup struct {
+}
+
+func (s *FreezerGroup) Set(d *data) error {
+	switch d.c.Freezer {
+	case cgroups.Frozen, cgroups.Thawed:
+		dir, err := d.path("freezer")
+		if err != nil {
+			return err
+		}
+
+		if err := writeFile(dir, "freezer.state", string(d.c.Freezer)); err != nil {
+			return err
+		}
+
+		for {
+			state, err := readFile(dir, "freezer.state")
+			if err != nil {
+				return err
+			}
+			if strings.TrimSpace(state) == string(d.c.Freezer) {
+				break
+			}
+			time.Sleep(1 * time.Millisecond)
+		}
+	default:
+		if _, err := d.join("freezer"); err != nil && !cgroups.IsNotFound(err) {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (s *FreezerGroup) Remove(d *data) error {
+	return removePath(d.path("freezer"))
+}
+
+func (s *FreezerGroup) GetStats(path string, stats *cgroups.Stats) error {
+	return nil
+}

Godeps/_workspace/src/github.com/docker/libcontainer/cgroups/fs/memory.go

+package fs
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strconv"
+
+	"github.com/docker/libcontainer/cgroups"
+)
+
+type MemoryGroup struct {
+}
+
+func (s *MemoryGroup) Set(d *data) error {
+	dir, err := d.join("memory")
+	// only return an error for memory if it was specified
+	if err != nil && (d.c.Memory != 0 || d.c.MemoryReservation != 0 || d.c.MemorySwap != 0) {
+		return err
+	}
+	defer func() {
+		if err != nil {
+			os.RemoveAll(dir)
+		}
+	}()
+
+	// Only set values if some config was specified.
+	if d.c.Memory != 0 || d.c.MemoryReservation != 0 || d.c.MemorySwap != 0 {
+		if d.c.Memory != 0 {
+			if err := writeFile(dir, "memory.limit_in_bytes", strconv.FormatInt(d.c.Memory, 10)); err != nil {
+				return err
+			}
+		}
+		if d.c.MemoryReservation != 0 {
+			if err := writeFile(dir, "memory.soft_limit_in_bytes", strconv.FormatInt(d.c.MemoryReservation, 10)); err != nil {
+				return err
+			}
+		}
+		// By default, MemorySwap is set to twice the size of RAM.
+		// If you want to omit MemorySwap, set it to '-1'.
+		if d.c.MemorySwap == 0 {
+			if err := writeFile(dir, "memory.memsw.limit_in_bytes", strconv.FormatInt(d.c.Memory*2, 10)); err != nil {
+				return err
+			}
+		}
+		if d.c.MemorySwap > 0 {
+			if err := writeFile(dir, "memory.memsw.limit_in_bytes", strconv.FormatInt(d.c.MemorySwap, 10)); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func (s *MemoryGroup) Remove(d *data) error {
+	return removePath(d.path("memory"))
+}
+
+func (s *MemoryGroup) GetStats(path string, stats *cgroups.Stats) error {
+	// Set stats from memory.stat.
+	statsFile, err := os.Open(filepath.Join(path, "memory.stat"))
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
+		return err
+	}
+	defer statsFile.Close()
+
+	sc := bufio.NewScanner(statsFile)
+	for sc.Scan() {
+		t, v, err := getCgroupParamKeyValue(sc.Text())
+		if err != nil {
+			return fmt.Errorf("failed to parse memory.stat (%q) - %v", sc.Text(), err)
+		}
+		stats.MemoryStats.Stats[t] = v
+	}
+
+	// Set memory usage and max historical usage.
+	value, err := getCgroupParamUint(path, "memory.usage_in_bytes")
+	if err != nil {
+		return fmt.Errorf("failed to parse memory.usage_in_bytes - %v", err)
+	}
+	stats.MemoryStats.Usage = value
+	value, err = getCgroupParamUint(path, "memory.max_usage_in_bytes")
+	if err != nil {
+		return fmt.Errorf("failed to parse memory.max_usage_in_bytes - %v", err)
+	}
+	stats.MemoryStats.MaxUsage = value
+	value, err = getCgroupParamUint(path, "memory.failcnt")
+	if err != nil {
+		return fmt.Errorf("failed to parse memory.failcnt - %v", err)
+	}
+	stats.MemoryStats.Failcnt = value
+
+	return nil
+}

Godeps/_workspace/src/github.com/docker/libcontainer/cgroups/fs/memory_test.go

+package fs
+
+import (
+	"testing"
+
+	"github.com/docker/libcontainer/cgroups"
+)
+
+const (
+	memoryStatContents = `cache 512
+rss 1024`
+	memoryUsageContents    = "2048\n"
+	memoryMaxUsageContents = "4096\n"
+	memoryFailcnt          = "100\n"
+)
+
+func TestMemoryStats(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+	helper.writeFileContents(map[string]string{
+		"memory.stat":               memoryStatContents,
+		"memory.usage_in_bytes":     memoryUsageContents,
+		"memory.max_usage_in_bytes": memoryMaxUsageContents,
+		"memory.failcnt":            memoryFailcnt,
+	})
+
+	memory := &MemoryGroup{}
+	actualStats := *cgroups.NewStats()
+	err := memory.GetStats(helper.CgroupPath, &actualStats)
+	if err != nil {
+		t.Fatal(err)
+	}
+	expectedStats := cgroups.MemoryStats{Usage: 2048, MaxUsage: 4096, Failcnt: 100, Stats: map[string]uint64{"cache": 512, "rss": 1024}}
+	expectMemoryStatEquals(t, expectedStats, actualStats.MemoryStats)
+}
+
+func TestMemoryStatsNoStatFile(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+	helper.writeFileContents(map[string]string{
+		"memory.usage_in_bytes":     memoryUsageContents,
+		"memory.max_usage_in_bytes": memoryMaxUsageContents,
+	})
+
+	memory := &MemoryGroup{}
+	actualStats := *cgroups.NewStats()
+	err := memory.GetStats(helper.CgroupPath, &actualStats)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestMemoryStatsNoUsageFile(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+	helper.writeFileContents(map[string]string{
+		"memory.stat":               memoryStatContents,
+		"memory.max_usage_in_bytes": memoryMaxUsageContents,
+	})
+
+	memory := &MemoryGroup{}
+	actualStats := *cgroups.NewStats()
+	err := memory.GetStats(helper.CgroupPath, &actualStats)
+	if err == nil {
+		t.Fatal("Expected failure")
+	}
+}
+
+func TestMemoryStatsNoMaxUsageFile(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+	helper.writeFileContents(map[string]string{
+		"memory.stat":           memoryStatContents,
+		"memory.usage_in_bytes": memoryUsageContents,
+	})
+
+	memory := &MemoryGroup{}
+	actualStats := *cgroups.NewStats()
+	err := memory.GetStats(helper.CgroupPath, &actualStats)
+	if err == nil {
+		t.Fatal("Expected failure")
+	}
+}
+
+func TestMemoryStatsBadStatFile(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+	helper.writeFileContents(map[string]string{
+		"memory.stat":               "rss rss",
+		"memory.usage_in_bytes":     memoryUsageContents,
+		"memory.max_usage_in_bytes": memoryMaxUsageContents,
+	})
+
+	memory := &MemoryGroup{}
+	actualStats := *cgroups.NewStats()
+	err := memory.GetStats(helper.CgroupPath, &actualStats)
+	if err == nil {
+		t.Fatal("Expected failure")
+	}
+}
+
+func TestMemoryStatsBadUsageFile(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+	helper.writeFileContents(map[string]string{
+		"memory.stat":               memoryStatContents,
+		"memory.usage_in_bytes":     "bad",
+		"memory.max_usage_in_bytes": memoryMaxUsageContents,
+	})
+
+	memory := &MemoryGroup{}
+	actualStats := *cgroups.NewStats()
+	err := memory.GetStats(helper.CgroupPath, &actualStats)
+	if err == nil {
+		t.Fatal("Expected failure")
+	}
+}
+
+func TestMemoryStatsBadMaxUsageFile(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+	helper.writeFileContents(map[string]string{
+		"memory.stat":               memoryStatContents,
+		"memory.usage_in_bytes":     memoryUsageContents,
+		"memory.max_usage_in_bytes": "bad",
+	})
+
+	memory := &MemoryGroup{}
+	actualStats := *cgroups.NewStats()
+	err := memory.GetStats(helper.CgroupPath, &actualStats)
+	if err == nil {
+		t.Fatal("Expected failure")
+	}
+}