Use ParseSignal and AtomicWriteFile functions from containerd

Containerd has its own ParseSignal and AtomicWriteFile implementation.
So there's no need to use these function from github.com/docker/docker.

Signed-off-by: Shengjing Zhu <i@zhsj.me>

pkg/server/container_stop.go

@@ -22,7 +22,6 @@ import (
 	"github.com/containerd/containerd"
 	eventtypes "github.com/containerd/containerd/api/events"
 	"github.com/containerd/containerd/errdefs"
-	"github.com/docker/docker/pkg/signal"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
@@ -134,7 +133,7 @@ func (c *criService) stopContainer(ctx context.Context, container containerstore
 				}
 			}
 		}
-		sig, err := signal.ParseSignal(stopSignal)
+		sig, err := containerd.ParseSignal(stopSignal)
 		if err != nil {
 			return errors.Wrapf(err, "failed to parse stop signal %q", stopSignal)
 		}

pkg/store/container/status.go

@@ -23,7 +23,7 @@ import (
 	"path/filepath"
 	"sync"
 
-	"github.com/docker/docker/pkg/ioutils"
+	"github.com/containerd/continuity"
 	"github.com/pkg/errors"
 	runtime "k8s.io/kubernetes/pkg/kubelet/apis/cri/runtime/v1alpha2"
 )
@@ -160,7 +160,7 @@ func StoreStatus(root, id string, status Status) (StatusStorage, error) {
 		return nil, errors.Wrap(err, "failed to encode status")
 	}
 	path := filepath.Join(root, "status")
-	if err := ioutils.AtomicWriteFile(path, data, 0600); err != nil {
+	if err := continuity.AtomicWriteFile(path, data, 0600); err != nil {
 		return nil, errors.Wrapf(err, "failed to checkpoint status to %q", path)
 	}
 	return &statusStorage{
@@ -209,7 +209,7 @@ func (s *statusStorage) UpdateSync(u UpdateFunc) error {
 	if err != nil {
 		return errors.Wrap(err, "failed to encode status")
 	}
-	if err := ioutils.AtomicWriteFile(s.path, data, 0600); err != nil {
+	if err := continuity.AtomicWriteFile(s.path, data, 0600); err != nil {
 		return errors.Wrapf(err, "failed to checkpoint status to %q", s.path)
 	}
 	s.status = newStatus

vendor/github.com/docker/docker/pkg/ioutils/buffer.go

@@ -1,51 +0,0 @@
-package ioutils
-
-import (
-	"errors"
-	"io"
-)
-
-var errBufferFull = errors.New("buffer is full")
-
-type fixedBuffer struct {
-	buf      []byte
-	pos      int
-	lastRead int
-}
-
-func (b *fixedBuffer) Write(p []byte) (int, error) {
-	n := copy(b.buf[b.pos:cap(b.buf)], p)
-	b.pos += n
-
-	if n < len(p) {
-		if b.pos == cap(b.buf) {
-			return n, errBufferFull
-		}
-		return n, io.ErrShortWrite
-	}
-	return n, nil
-}
-
-func (b *fixedBuffer) Read(p []byte) (int, error) {
-	n := copy(p, b.buf[b.lastRead:b.pos])
-	b.lastRead += n
-	return n, nil
-}
-
-func (b *fixedBuffer) Len() int {
-	return b.pos - b.lastRead
-}
-
-func (b *fixedBuffer) Cap() int {
-	return cap(b.buf)
-}
-
-func (b *fixedBuffer) Reset() {
-	b.pos = 0
-	b.lastRead = 0
-	b.buf = b.buf[:0]
-}
-
-func (b *fixedBuffer) String() string {
-	return string(b.buf[b.lastRead:b.pos])
-}

vendor/github.com/docker/docker/pkg/ioutils/bytespipe.go

@@ -1,186 +0,0 @@
-package ioutils
-
-import (
-	"errors"
-	"io"
-	"sync"
-)
-
-// maxCap is the highest capacity to use in byte slices that buffer data.
-const maxCap = 1e6
-
-// minCap is the lowest capacity to use in byte slices that buffer data
-const minCap = 64
-
-// blockThreshold is the minimum number of bytes in the buffer which will cause
-// a write to BytesPipe to block when allocating a new slice.
-const blockThreshold = 1e6
-
-var (
-	// ErrClosed is returned when Write is called on a closed BytesPipe.
-	ErrClosed = errors.New("write to closed BytesPipe")
-
-	bufPools     = make(map[int]*sync.Pool)
-	bufPoolsLock sync.Mutex
-)
-
-// BytesPipe is io.ReadWriteCloser which works similarly to pipe(queue).
-// All written data may be read at most once. Also, BytesPipe allocates
-// and releases new byte slices to adjust to current needs, so the buffer
-// won't be overgrown after peak loads.
-type BytesPipe struct {
-	mu       sync.Mutex
-	wait     *sync.Cond
-	buf      []*fixedBuffer
-	bufLen   int
-	closeErr error // error to return from next Read. set to nil if not closed.
-}
-
-// NewBytesPipe creates new BytesPipe, initialized by specified slice.
-// If buf is nil, then it will be initialized with slice which cap is 64.
-// buf will be adjusted in a way that len(buf) == 0, cap(buf) == cap(buf).
-func NewBytesPipe() *BytesPipe {
-	bp := &BytesPipe{}
-	bp.buf = append(bp.buf, getBuffer(minCap))
-	bp.wait = sync.NewCond(&bp.mu)
-	return bp
-}
-
-// Write writes p to BytesPipe.
-// It can allocate new []byte slices in a process of writing.
-func (bp *BytesPipe) Write(p []byte) (int, error) {
-	bp.mu.Lock()
-
-	written := 0
-loop0:
-	for {
-		if bp.closeErr != nil {
-			bp.mu.Unlock()
-			return written, ErrClosed
-		}
-
-		if len(bp.buf) == 0 {
-			bp.buf = append(bp.buf, getBuffer(64))
-		}
-		// get the last buffer
-		b := bp.buf[len(bp.buf)-1]
-
-		n, err := b.Write(p)
-		written += n
-		bp.bufLen += n
-
-		// errBufferFull is an error we expect to get if the buffer is full
-		if err != nil && err != errBufferFull {
-			bp.wait.Broadcast()
-			bp.mu.Unlock()
-			return written, err
-		}
-
-		// if there was enough room to write all then break
-		if len(p) == n {
-			break
-		}
-
-		// more data: write to the next slice
-		p = p[n:]
-
-		// make sure the buffer doesn't grow too big from this write
-		for bp.bufLen >= blockThreshold {
-			bp.wait.Wait()
-			if bp.closeErr != nil {
-				continue loop0
-			}
-		}
-
-		// add new byte slice to the buffers slice and continue writing
-		nextCap := b.Cap() * 2
-		if nextCap > maxCap {
-			nextCap = maxCap
-		}
-		bp.buf = append(bp.buf, getBuffer(nextCap))
-	}
-	bp.wait.Broadcast()
-	bp.mu.Unlock()
-	return written, nil
-}
-
-// CloseWithError causes further reads from a BytesPipe to return immediately.
-func (bp *BytesPipe) CloseWithError(err error) error {
-	bp.mu.Lock()
-	if err != nil {
-		bp.closeErr = err
-	} else {
-		bp.closeErr = io.EOF
-	}
-	bp.wait.Broadcast()
-	bp.mu.Unlock()
-	return nil
-}
-
-// Close causes further reads from a BytesPipe to return immediately.
-func (bp *BytesPipe) Close() error {
-	return bp.CloseWithError(nil)
-}
-
-// Read reads bytes from BytesPipe.
-// Data could be read only once.
-func (bp *BytesPipe) Read(p []byte) (n int, err error) {
-	bp.mu.Lock()
-	if bp.bufLen == 0 {
-		if bp.closeErr != nil {
-			bp.mu.Unlock()
-			return 0, bp.closeErr
-		}
-		bp.wait.Wait()
-		if bp.bufLen == 0 && bp.closeErr != nil {
-			err := bp.closeErr
-			bp.mu.Unlock()
-			return 0, err
-		}
-	}
-
-	for bp.bufLen > 0 {
-		b := bp.buf[0]
-		read, _ := b.Read(p) // ignore error since fixedBuffer doesn't really return an error
-		n += read
-		bp.bufLen -= read
-
-		if b.Len() == 0 {
-			// it's empty so return it to the pool and move to the next one
-			returnBuffer(b)
-			bp.buf[0] = nil
-			bp.buf = bp.buf[1:]
-		}
-
-		if len(p) == read {
-			break
-		}
-
-		p = p[read:]
-	}
-
-	bp.wait.Broadcast()
-	bp.mu.Unlock()
-	return
-}
-
-func returnBuffer(b *fixedBuffer) {
-	b.Reset()
-	bufPoolsLock.Lock()
-	pool := bufPools[b.Cap()]
-	bufPoolsLock.Unlock()
-	if pool != nil {
-		pool.Put(b)
-	}
-}
-
-func getBuffer(size int) *fixedBuffer {
-	bufPoolsLock.Lock()
-	pool, ok := bufPools[size]
-	if !ok {
-		pool = &sync.Pool{New: func() interface{} { return &fixedBuffer{buf: make([]byte, 0, size)} }}
-		bufPools[size] = pool
-	}
-	bufPoolsLock.Unlock()
-	return pool.Get().(*fixedBuffer)
-}

vendor/github.com/docker/docker/pkg/ioutils/fswriters.go

@@ -1,162 +0,0 @@
-package ioutils
-
-import (
-	"io"
-	"io/ioutil"
-	"os"
-	"path/filepath"
-)
-
-// NewAtomicFileWriter returns WriteCloser so that writing to it writes to a
-// temporary file and closing it atomically changes the temporary file to
-// destination path. Writing and closing concurrently is not allowed.
-func NewAtomicFileWriter(filename string, perm os.FileMode) (io.WriteCloser, error) {
-	f, err := ioutil.TempFile(filepath.Dir(filename), ".tmp-"+filepath.Base(filename))
-	if err != nil {
-		return nil, err
-	}
-
-	abspath, err := filepath.Abs(filename)
-	if err != nil {
-		return nil, err
-	}
-	return &atomicFileWriter{
-		f:    f,
-		fn:   abspath,
-		perm: perm,
-	}, nil
-}
-
-// AtomicWriteFile atomically writes data to a file named by filename.
-func AtomicWriteFile(filename string, data []byte, perm os.FileMode) error {
-	f, err := NewAtomicFileWriter(filename, perm)
-	if err != nil {
-		return err
-	}
-	n, err := f.Write(data)
-	if err == nil && n < len(data) {
-		err = io.ErrShortWrite
-		f.(*atomicFileWriter).writeErr = err
-	}
-	if err1 := f.Close(); err == nil {
-		err = err1
-	}
-	return err
-}
-
-type atomicFileWriter struct {
-	f        *os.File
-	fn       string
-	writeErr error
-	perm     os.FileMode
-}
-
-func (w *atomicFileWriter) Write(dt []byte) (int, error) {
-	n, err := w.f.Write(dt)
-	if err != nil {
-		w.writeErr = err
-	}
-	return n, err
-}
-
-func (w *atomicFileWriter) Close() (retErr error) {
-	defer func() {
-		if retErr != nil || w.writeErr != nil {
-			os.Remove(w.f.Name())
-		}
-	}()
-	if err := w.f.Sync(); err != nil {
-		w.f.Close()
-		return err
-	}
-	if err := w.f.Close(); err != nil {
-		return err
-	}
-	if err := os.Chmod(w.f.Name(), w.perm); err != nil {
-		return err
-	}
-	if w.writeErr == nil {
-		return os.Rename(w.f.Name(), w.fn)
-	}
-	return nil
-}
-
-// AtomicWriteSet is used to atomically write a set
-// of files and ensure they are visible at the same time.
-// Must be committed to a new directory.
-type AtomicWriteSet struct {
-	root string
-}
-
-// NewAtomicWriteSet creates a new atomic write set to
-// atomically create a set of files. The given directory
-// is used as the base directory for storing files before
-// commit. If no temporary directory is given the system
-// default is used.
-func NewAtomicWriteSet(tmpDir string) (*AtomicWriteSet, error) {
-	td, err := ioutil.TempDir(tmpDir, "write-set-")
-	if err != nil {
-		return nil, err
-	}
-
-	return &AtomicWriteSet{
-		root: td,
-	}, nil
-}
-
-// WriteFile writes a file to the set, guaranteeing the file
-// has been synced.
-func (ws *AtomicWriteSet) WriteFile(filename string, data []byte, perm os.FileMode) error {
-	f, err := ws.FileWriter(filename, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm)
-	if err != nil {
-		return err
-	}
-	n, err := f.Write(data)
-	if err == nil && n < len(data) {
-		err = io.ErrShortWrite
-	}
-	if err1 := f.Close(); err == nil {
-		err = err1
-	}
-	return err
-}
-
-type syncFileCloser struct {
-	*os.File
-}
-
-func (w syncFileCloser) Close() error {
-	err := w.File.Sync()
-	if err1 := w.File.Close(); err == nil {
-		err = err1
-	}
-	return err
-}
-
-// FileWriter opens a file writer inside the set. The file
-// should be synced and closed before calling commit.
-func (ws *AtomicWriteSet) FileWriter(name string, flag int, perm os.FileMode) (io.WriteCloser, error) {
-	f, err := os.OpenFile(filepath.Join(ws.root, name), flag, perm)
-	if err != nil {
-		return nil, err
-	}
-	return syncFileCloser{f}, nil
-}
-
-// Cancel cancels the set and removes all temporary data
-// created in the set.
-func (ws *AtomicWriteSet) Cancel() error {
-	return os.RemoveAll(ws.root)
-}
-
-// Commit moves all created files to the target directory. The
-// target directory must not exist and the parent of the target
-// directory must exist.
-func (ws *AtomicWriteSet) Commit(target string) error {
-	return os.Rename(ws.root, target)
-}
-
-// String returns the location the set is writing to.
-func (ws *AtomicWriteSet) String() string {
-	return ws.root
-}

vendor/github.com/docker/docker/pkg/ioutils/readers.go

@@ -1,154 +0,0 @@
-package ioutils
-
-import (
-	"crypto/sha256"
-	"encoding/hex"
-	"io"
-
-	"golang.org/x/net/context"
-)
-
-type readCloserWrapper struct {
-	io.Reader
-	closer func() error
-}
-
-func (r *readCloserWrapper) Close() error {
-	return r.closer()
-}
-
-// NewReadCloserWrapper returns a new io.ReadCloser.
-func NewReadCloserWrapper(r io.Reader, closer func() error) io.ReadCloser {
-	return &readCloserWrapper{
-		Reader: r,
-		closer: closer,
-	}
-}
-
-type readerErrWrapper struct {
-	reader io.Reader
-	closer func()
-}
-
-func (r *readerErrWrapper) Read(p []byte) (int, error) {
-	n, err := r.reader.Read(p)
-	if err != nil {
-		r.closer()
-	}
-	return n, err
-}
-
-// NewReaderErrWrapper returns a new io.Reader.
-func NewReaderErrWrapper(r io.Reader, closer func()) io.Reader {
-	return &readerErrWrapper{
-		reader: r,
-		closer: closer,
-	}
-}
-
-// HashData returns the sha256 sum of src.
-func HashData(src io.Reader) (string, error) {
-	h := sha256.New()
-	if _, err := io.Copy(h, src); err != nil {
-		return "", err
-	}
-	return "sha256:" + hex.EncodeToString(h.Sum(nil)), nil
-}
-
-// OnEOFReader wraps an io.ReadCloser and a function
-// the function will run at the end of file or close the file.
-type OnEOFReader struct {
-	Rc io.ReadCloser
-	Fn func()
-}
-
-func (r *OnEOFReader) Read(p []byte) (n int, err error) {
-	n, err = r.Rc.Read(p)
-	if err == io.EOF {
-		r.runFunc()
-	}
-	return
-}
-
-// Close closes the file and run the function.
-func (r *OnEOFReader) Close() error {
-	err := r.Rc.Close()
-	r.runFunc()
-	return err
-}
-
-func (r *OnEOFReader) runFunc() {
-	if fn := r.Fn; fn != nil {
-		fn()
-		r.Fn = nil
-	}
-}
-
-// cancelReadCloser wraps an io.ReadCloser with a context for cancelling read
-// operations.
-type cancelReadCloser struct {
-	cancel func()
-	pR     *io.PipeReader // Stream to read from
-	pW     *io.PipeWriter
-}
-
-// NewCancelReadCloser creates a wrapper that closes the ReadCloser when the
-// context is cancelled. The returned io.ReadCloser must be closed when it is
-// no longer needed.
-func NewCancelReadCloser(ctx context.Context, in io.ReadCloser) io.ReadCloser {
-	pR, pW := io.Pipe()
-
-	// Create a context used to signal when the pipe is closed
-	doneCtx, cancel := context.WithCancel(context.Background())
-
-	p := &cancelReadCloser{
-		cancel: cancel,
-		pR:     pR,
-		pW:     pW,
-	}
-
-	go func() {
-		_, err := io.Copy(pW, in)
-		select {
-		case <-ctx.Done():
-			// If the context was closed, p.closeWithError
-			// was already called. Calling it again would
-			// change the error that Read returns.
-		default:
-			p.closeWithError(err)
-		}
-		in.Close()
-	}()
-	go func() {
-		for {
-			select {
-			case <-ctx.Done():
-				p.closeWithError(ctx.Err())
-			case <-doneCtx.Done():
-				return
-			}
-		}
-	}()
-
-	return p
-}
-
-// Read wraps the Read method of the pipe that provides data from the wrapped
-// ReadCloser.
-func (p *cancelReadCloser) Read(buf []byte) (n int, err error) {
-	return p.pR.Read(buf)
-}
-
-// closeWithError closes the wrapper and its underlying reader. It will
-// cause future calls to Read to return err.
-func (p *cancelReadCloser) closeWithError(err error) {
-	p.pW.CloseWithError(err)
-	p.cancel()
-}
-
-// Close closes the wrapper its underlying reader. It will cause
-// future calls to Read to return io.EOF.
-func (p *cancelReadCloser) Close() error {
-	p.closeWithError(io.EOF)
-	return nil
-}

vendor/github.com/docker/docker/pkg/ioutils/temp_unix.go

@@ -1,10 +0,0 @@
-// +build !windows
-
-package ioutils
-
-import "io/ioutil"
-
-// TempDir on Unix systems is equivalent to ioutil.TempDir.
-func TempDir(dir, prefix string) (string, error) {
-	return ioutil.TempDir(dir, prefix)
-}

vendor/github.com/docker/docker/pkg/ioutils/temp_windows.go

@@ -1,18 +0,0 @@
-// +build windows
-
-package ioutils
-
-import (
-	"io/ioutil"
-
-	"github.com/docker/docker/pkg/longpath"
-)
-
-// TempDir is the equivalent of ioutil.TempDir, except that the result is in Windows longpath format.
-func TempDir(dir, prefix string) (string, error) {
-	tempDir, err := ioutil.TempDir(dir, prefix)
-	if err != nil {
-		return "", err
-	}
-	return longpath.AddPrefix(tempDir), nil
-}

vendor/github.com/docker/docker/pkg/ioutils/writeflusher.go

@@ -1,92 +0,0 @@
-package ioutils
-
-import (
-	"io"
-	"sync"
-)
-
-// WriteFlusher wraps the Write and Flush operation ensuring that every write
-// is a flush. In addition, the Close method can be called to intercept
-// Read/Write calls if the targets lifecycle has already ended.
-type WriteFlusher struct {
-	w           io.Writer
-	flusher     flusher
-	flushed     chan struct{}
-	flushedOnce sync.Once
-	closed      chan struct{}
-	closeLock   sync.Mutex
-}
-
-type flusher interface {
-	Flush()
-}
-
-var errWriteFlusherClosed = io.EOF
-
-func (wf *WriteFlusher) Write(b []byte) (n int, err error) {
-	select {
-	case <-wf.closed:
-		return 0, errWriteFlusherClosed
-	default:
-	}
-
-	n, err = wf.w.Write(b)
-	wf.Flush() // every write is a flush.
-	return n, err
-}
-
-// Flush the stream immediately.
-func (wf *WriteFlusher) Flush() {
-	select {
-	case <-wf.closed:
-		return
-	default:
-	}
-
-	wf.flushedOnce.Do(func() {
-		close(wf.flushed)
-	})
-	wf.flusher.Flush()
-}
-
-// Flushed returns the state of flushed.
-// If it's flushed, return true, or else it return false.
-func (wf *WriteFlusher) Flushed() bool {
-	// BUG(stevvooe): Remove this method. Its use is inherently racy. Seems to
-	// be used to detect whether or a response code has been issued or not.
-	// Another hook should be used instead.
-	var flushed bool
-	select {
-	case <-wf.flushed:
-		flushed = true
-	default:
-	}
-	return flushed
-}
-
-// Close closes the write flusher, disallowing any further writes to the
-// target. After the flusher is closed, all calls to write or flush will
-// result in an error.
-func (wf *WriteFlusher) Close() error {
-	wf.closeLock.Lock()
-	defer wf.closeLock.Unlock()
-
-	select {
-	case <-wf.closed:
-		return errWriteFlusherClosed
-	default:
-		close(wf.closed)
-	}
-	return nil
-}
-
-// NewWriteFlusher returns a new WriteFlusher.
-func NewWriteFlusher(w io.Writer) *WriteFlusher {
-	var fl flusher
-	if f, ok := w.(flusher); ok {
-		fl = f
-	} else {
-		fl = &NopFlusher{}
-	}
-	return &WriteFlusher{w: w, flusher: fl, closed: make(chan struct{}), flushed: make(chan struct{})}
-}

vendor/github.com/docker/docker/pkg/ioutils/writers.go

@@ -1,66 +0,0 @@
-package ioutils
-
-import "io"
-
-// NopWriter represents a type which write operation is nop.
-type NopWriter struct{}
-
-func (*NopWriter) Write(buf []byte) (int, error) {
-	return len(buf), nil
-}
-
-type nopWriteCloser struct {
-	io.Writer
-}
-
-func (w *nopWriteCloser) Close() error { return nil }
-
-// NopWriteCloser returns a nopWriteCloser.
-func NopWriteCloser(w io.Writer) io.WriteCloser {
-	return &nopWriteCloser{w}
-}
-
-// NopFlusher represents a type which flush operation is nop.
-type NopFlusher struct{}
-
-// Flush is a nop operation.
-func (f *NopFlusher) Flush() {}
-
-type writeCloserWrapper struct {
-	io.Writer
-	closer func() error
-}
-
-func (r *writeCloserWrapper) Close() error {
-	return r.closer()
-}
-
-// NewWriteCloserWrapper returns a new io.WriteCloser.
-func NewWriteCloserWrapper(r io.Writer, closer func() error) io.WriteCloser {
-	return &writeCloserWrapper{
-		Writer: r,
-		closer: closer,
-	}
-}
-
-// WriteCounter wraps a concrete io.Writer and hold a count of the number
-// of bytes written to the writer during a "session".
-// This can be convenient when write return is masked
-// (e.g., json.Encoder.Encode())
-type WriteCounter struct {
-	Count  int64
-	Writer io.Writer
-}
-
-// NewWriteCounter returns a new WriteCounter.
-func NewWriteCounter(w io.Writer) *WriteCounter {
-	return &WriteCounter{
-		Writer: w,
-	}
-}
-
-func (wc *WriteCounter) Write(p []byte) (count int, err error) {
-	count, err = wc.Writer.Write(p)
-	wc.Count += int64(count)
-	return
-}

vendor/github.com/docker/docker/pkg/signal/README.md

@@ -1 +0,0 @@
-This package provides helper functions for dealing with signals across various operating systems

vendor/github.com/docker/docker/pkg/signal/signal.go

@@ -1,54 +0,0 @@
-// Package signal provides helper functions for dealing with signals across
-// various operating systems.
-package signal
-
-import (
-	"fmt"
-	"os"
-	"os/signal"
-	"strconv"
-	"strings"
-	"syscall"
-)
-
-// CatchAll catches all signals and relays them to the specified channel.
-func CatchAll(sigc chan os.Signal) {
-	handledSigs := []os.Signal{}
-	for _, s := range SignalMap {
-		handledSigs = append(handledSigs, s)
-	}
-	signal.Notify(sigc, handledSigs...)
-}
-
-// StopCatch stops catching the signals and closes the specified channel.
-func StopCatch(sigc chan os.Signal) {
-	signal.Stop(sigc)
-	close(sigc)
-}
-
-// ParseSignal translates a string to a valid syscall signal.
-// It returns an error if the signal map doesn't include the given signal.
-func ParseSignal(rawSignal string) (syscall.Signal, error) {
-	s, err := strconv.Atoi(rawSignal)
-	if err == nil {
-		if s == 0 {
-			return -1, fmt.Errorf("Invalid signal: %s", rawSignal)
-		}
-		return syscall.Signal(s), nil
-	}
-	signal, ok := SignalMap[strings.TrimPrefix(strings.ToUpper(rawSignal), "SIG")]
-	if !ok {
-		return -1, fmt.Errorf("Invalid signal: %s", rawSignal)
-	}
-	return signal, nil
-}
-
-// ValidSignalForPlatform returns true if a signal is valid on the platform
-func ValidSignalForPlatform(sig syscall.Signal) bool {
-	for _, v := range SignalMap {
-		if v == sig {
-			return true
-		}
-	}
-	return false
-}

vendor/github.com/docker/docker/pkg/signal/signal_darwin.go

@@ -1,41 +0,0 @@
-package signal
-
-import (
-	"syscall"
-)
-
-// SignalMap is a map of Darwin signals.
-var SignalMap = map[string]syscall.Signal{
-	"ABRT":   syscall.SIGABRT,
-	"ALRM":   syscall.SIGALRM,
-	"BUG":    syscall.SIGBUS,
-	"CHLD":   syscall.SIGCHLD,
-	"CONT":   syscall.SIGCONT,
-	"EMT":    syscall.SIGEMT,
-	"FPE":    syscall.SIGFPE,
-	"HUP":    syscall.SIGHUP,
-	"ILL":    syscall.SIGILL,
-	"INFO":   syscall.SIGINFO,
-	"INT":    syscall.SIGINT,
-	"IO":     syscall.SIGIO,
-	"IOT":    syscall.SIGIOT,
-	"KILL":   syscall.SIGKILL,
-	"PIPE":   syscall.SIGPIPE,
-	"PROF":   syscall.SIGPROF,
-	"QUIT":   syscall.SIGQUIT,
-	"SEGV":   syscall.SIGSEGV,
-	"STOP":   syscall.SIGSTOP,
-	"SYS":    syscall.SIGSYS,
-	"TERM":   syscall.SIGTERM,
-	"TRAP":   syscall.SIGTRAP,
-	"TSTP":   syscall.SIGTSTP,
-	"TTIN":   syscall.SIGTTIN,
-	"TTOU":   syscall.SIGTTOU,
-	"URG":    syscall.SIGURG,
-	"USR1":   syscall.SIGUSR1,
-	"USR2":   syscall.SIGUSR2,
-	"VTALRM": syscall.SIGVTALRM,
-	"WINCH":  syscall.SIGWINCH,
-	"XCPU":   syscall.SIGXCPU,
-	"XFSZ":   syscall.SIGXFSZ,
-}

vendor/github.com/docker/docker/pkg/signal/signal_freebsd.go

@@ -1,43 +0,0 @@
-package signal
-
-import (
-	"syscall"
-)
-
-// SignalMap is a map of FreeBSD signals.
-var SignalMap = map[string]syscall.Signal{
-	"ABRT":   syscall.SIGABRT,
-	"ALRM":   syscall.SIGALRM,
-	"BUF":    syscall.SIGBUS,
-	"CHLD":   syscall.SIGCHLD,
-	"CONT":   syscall.SIGCONT,
-	"EMT":    syscall.SIGEMT,
-	"FPE":    syscall.SIGFPE,
-	"HUP":    syscall.SIGHUP,
-	"ILL":    syscall.SIGILL,
-	"INFO":   syscall.SIGINFO,
-	"INT":    syscall.SIGINT,
-	"IO":     syscall.SIGIO,
-	"IOT":    syscall.SIGIOT,
-	"KILL":   syscall.SIGKILL,
-	"LWP":    syscall.SIGLWP,
-	"PIPE":   syscall.SIGPIPE,
-	"PROF":   syscall.SIGPROF,
-	"QUIT":   syscall.SIGQUIT,
-	"SEGV":   syscall.SIGSEGV,
-	"STOP":   syscall.SIGSTOP,
-	"SYS":    syscall.SIGSYS,
-	"TERM":   syscall.SIGTERM,
-	"THR":    syscall.SIGTHR,
-	"TRAP":   syscall.SIGTRAP,
-	"TSTP":   syscall.SIGTSTP,
-	"TTIN":   syscall.SIGTTIN,
-	"TTOU":   syscall.SIGTTOU,
-	"URG":    syscall.SIGURG,
-	"USR1":   syscall.SIGUSR1,
-	"USR2":   syscall.SIGUSR2,
-	"VTALRM": syscall.SIGVTALRM,
-	"WINCH":  syscall.SIGWINCH,
-	"XCPU":   syscall.SIGXCPU,
-	"XFSZ":   syscall.SIGXFSZ,
-}

vendor/github.com/docker/docker/pkg/signal/signal_linux.go

@@ -1,81 +0,0 @@
-package signal
-
-import (
-	"syscall"
-
-	"golang.org/x/sys/unix"
-)
-
-const (
-	sigrtmin = 34
-	sigrtmax = 64
-)
-
-// SignalMap is a map of Linux signals.
-var SignalMap = map[string]syscall.Signal{
-	"ABRT":     unix.SIGABRT,
-	"ALRM":     unix.SIGALRM,
-	"BUS":      unix.SIGBUS,
-	"CHLD":     unix.SIGCHLD,
-	"CLD":      unix.SIGCLD,
-	"CONT":     unix.SIGCONT,
-	"FPE":      unix.SIGFPE,
-	"HUP":      unix.SIGHUP,
-	"ILL":      unix.SIGILL,
-	"INT":      unix.SIGINT,
-	"IO":       unix.SIGIO,
-	"IOT":      unix.SIGIOT,
-	"KILL":     unix.SIGKILL,
-	"PIPE":     unix.SIGPIPE,
-	"POLL":     unix.SIGPOLL,
-	"PROF":     unix.SIGPROF,
-	"PWR":      unix.SIGPWR,
-	"QUIT":     unix.SIGQUIT,
-	"SEGV":     unix.SIGSEGV,
-	"STKFLT":   unix.SIGSTKFLT,
-	"STOP":     unix.SIGSTOP,
-	"SYS":      unix.SIGSYS,
-	"TERM":     unix.SIGTERM,
-	"TRAP":     unix.SIGTRAP,
-	"TSTP":     unix.SIGTSTP,
-	"TTIN":     unix.SIGTTIN,
-	"TTOU":     unix.SIGTTOU,
-	"URG":      unix.SIGURG,
-	"USR1":     unix.SIGUSR1,
-	"USR2":     unix.SIGUSR2,
-	"VTALRM":   unix.SIGVTALRM,
-	"WINCH":    unix.SIGWINCH,
-	"XCPU":     unix.SIGXCPU,
-	"XFSZ":     unix.SIGXFSZ,
-	"RTMIN":    sigrtmin,
-	"RTMIN+1":  sigrtmin + 1,
-	"RTMIN+2":  sigrtmin + 2,
-	"RTMIN+3":  sigrtmin + 3,
-	"RTMIN+4":  sigrtmin + 4,
-	"RTMIN+5":  sigrtmin + 5,
-	"RTMIN+6":  sigrtmin + 6,
-	"RTMIN+7":  sigrtmin + 7,
-	"RTMIN+8":  sigrtmin + 8,
-	"RTMIN+9":  sigrtmin + 9,
-	"RTMIN+10": sigrtmin + 10,
-	"RTMIN+11": sigrtmin + 11,
-	"RTMIN+12": sigrtmin + 12,
-	"RTMIN+13": sigrtmin + 13,
-	"RTMIN+14": sigrtmin + 14,
-	"RTMIN+15": sigrtmin + 15,
-	"RTMAX-14": sigrtmax - 14,
-	"RTMAX-13": sigrtmax - 13,
-	"RTMAX-12": sigrtmax - 12,
-	"RTMAX-11": sigrtmax - 11,
-	"RTMAX-10": sigrtmax - 10,
-	"RTMAX-9":  sigrtmax - 9,
-	"RTMAX-8":  sigrtmax - 8,
-	"RTMAX-7":  sigrtmax - 7,
-	"RTMAX-6":  sigrtmax - 6,
-	"RTMAX-5":  sigrtmax - 5,
-	"RTMAX-4":  sigrtmax - 4,
-	"RTMAX-3":  sigrtmax - 3,
-	"RTMAX-2":  sigrtmax - 2,
-	"RTMAX-1":  sigrtmax - 1,
-	"RTMAX":    sigrtmax,
-}

vendor/github.com/docker/docker/pkg/signal/signal_solaris.go

@@ -1,42 +0,0 @@
-package signal
-
-import (
-	"syscall"
-)
-
-// SignalMap is a map of Solaris signals.
-// SIGINFO and SIGTHR not defined for Solaris
-var SignalMap = map[string]syscall.Signal{
-	"ABRT":   syscall.SIGABRT,
-	"ALRM":   syscall.SIGALRM,
-	"BUF":    syscall.SIGBUS,
-	"CHLD":   syscall.SIGCHLD,
-	"CONT":   syscall.SIGCONT,
-	"EMT":    syscall.SIGEMT,
-	"FPE":    syscall.SIGFPE,
-	"HUP":    syscall.SIGHUP,
-	"ILL":    syscall.SIGILL,
-	"INT":    syscall.SIGINT,
-	"IO":     syscall.SIGIO,
-	"IOT":    syscall.SIGIOT,
-	"KILL":   syscall.SIGKILL,
-	"LWP":    syscall.SIGLWP,
-	"PIPE":   syscall.SIGPIPE,
-	"PROF":   syscall.SIGPROF,
-	"QUIT":   syscall.SIGQUIT,
-	"SEGV":   syscall.SIGSEGV,
-	"STOP":   syscall.SIGSTOP,
-	"SYS":    syscall.SIGSYS,
-	"TERM":   syscall.SIGTERM,
-	"TRAP":   syscall.SIGTRAP,
-	"TSTP":   syscall.SIGTSTP,
-	"TTIN":   syscall.SIGTTIN,
-	"TTOU":   syscall.SIGTTOU,
-	"URG":    syscall.SIGURG,
-	"USR1":   syscall.SIGUSR1,
-	"USR2":   syscall.SIGUSR2,
-	"VTALRM": syscall.SIGVTALRM,
-	"WINCH":  syscall.SIGWINCH,
-	"XCPU":   syscall.SIGXCPU,
-	"XFSZ":   syscall.SIGXFSZ,
-}

vendor/github.com/docker/docker/pkg/signal/signal_unix.go

@@ -1,21 +0,0 @@
-// +build !windows
-
-package signal
-
-import (
-	"syscall"
-)
-
-// Signals used in cli/command (no windows equivalent, use
-// invalid signals so they don't get handled)
-
-const (
-	// SIGCHLD is a signal sent to a process when a child process terminates, is interrupted, or resumes after being interrupted.
-	SIGCHLD = syscall.SIGCHLD
-	// SIGWINCH is a signal sent to a process when its controlling terminal changes its size
-	SIGWINCH = syscall.SIGWINCH
-	// SIGPIPE is a signal sent to a process when a pipe is written to before the other end is open for reading
-	SIGPIPE = syscall.SIGPIPE
-	// DefaultStopSignal is the syscall signal used to stop a container in unix systems.
-	DefaultStopSignal = "SIGTERM"
-)

vendor/github.com/docker/docker/pkg/signal/signal_unsupported.go

@@ -1,10 +0,0 @@
-// +build !linux,!darwin,!freebsd,!windows,!solaris
-
-package signal
-
-import (
-	"syscall"
-)
-
-// SignalMap is an empty map of signals for unsupported platform.
-var SignalMap = map[string]syscall.Signal{}

vendor/github.com/docker/docker/pkg/signal/signal_windows.go

@@ -1,28 +0,0 @@
-// +build windows
-
-package signal
-
-import (
-	"syscall"
-)
-
-// Signals used in cli/command (no windows equivalent, use
-// invalid signals so they don't get handled)
-const (
-	SIGCHLD  = syscall.Signal(0xff)
-	SIGWINCH = syscall.Signal(0xff)
-	SIGPIPE  = syscall.Signal(0xff)
-	// DefaultStopSignal is the syscall signal used to stop a container in windows systems.
-	DefaultStopSignal = "15"
-)
-
-// SignalMap is a map of "supported" signals. As per the comment in GOLang's
-// ztypes_windows.go: "More invented values for signals". Windows doesn't
-// really support signals in any way, shape or form that Unix does.
-//
-// We have these so that docker kill can be used to gracefully (TERM) and
-// forcibly (KILL) terminate a container on Windows.
-var SignalMap = map[string]syscall.Signal{
-	"KILL": syscall.SIGKILL,
-	"TERM": syscall.SIGTERM,
-}

vendor/github.com/docker/docker/pkg/signal/trap.go

@@ -1,104 +0,0 @@
-package signal
-
-import (
-	"fmt"
-	"os"
-	gosignal "os/signal"
-	"path/filepath"
-	"runtime"
-	"strings"
-	"sync/atomic"
-	"syscall"
-	"time"
-
-	"github.com/pkg/errors"
-)
-
-// Trap sets up a simplified signal "trap", appropriate for common
-// behavior expected from a vanilla unix command-line tool in general
-// (and the Docker engine in particular).
-//
-// * If SIGINT or SIGTERM are received, `cleanup` is called, then the process is terminated.
-// * If SIGINT or SIGTERM are received 3 times before cleanup is complete, then cleanup is
-//   skipped and the process is terminated immediately (allows force quit of stuck daemon)
-// * A SIGQUIT always causes an exit without cleanup, with a goroutine dump preceding exit.
-// * Ignore SIGPIPE events. These are generated by systemd when journald is restarted while
-//   the docker daemon is not restarted and also running under systemd.
-//   Fixes https://github.com/docker/docker/issues/19728
-//
-func Trap(cleanup func(), logger interface {
-	Info(args ...interface{})
-}) {
-	c := make(chan os.Signal, 1)
-	// we will handle INT, TERM, QUIT, SIGPIPE here
-	signals := []os.Signal{os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT, syscall.SIGPIPE}
-	gosignal.Notify(c, signals...)
-	go func() {
-		interruptCount := uint32(0)
-		for sig := range c {
-			if sig == syscall.SIGPIPE {
-				continue
-			}
-
-			go func(sig os.Signal) {
-				logger.Info(fmt.Sprintf("Processing signal '%v'", sig))
-				switch sig {
-				case os.Interrupt, syscall.SIGTERM:
-					if atomic.LoadUint32(&interruptCount) < 3 {
-						// Initiate the cleanup only once
-						if atomic.AddUint32(&interruptCount, 1) == 1 {
-							// Call the provided cleanup handler
-							cleanup()
-							os.Exit(0)
-						} else {
-							return
-						}
-					} else {
-						// 3 SIGTERM/INT signals received; force exit without cleanup
-						logger.Info("Forcing docker daemon shutdown without cleanup; 3 interrupts received")
-					}
-				case syscall.SIGQUIT:
-					DumpStacks("")
-					logger.Info("Forcing docker daemon shutdown without cleanup on SIGQUIT")
-				}
-				//for the SIGINT/TERM, and SIGQUIT non-clean shutdown case, exit with 128 + signal #
-				os.Exit(128 + int(sig.(syscall.Signal)))
-			}(sig)
-		}
-	}()
-}
-
-const stacksLogNameTemplate = "goroutine-stacks-%s.log"
-
-// DumpStacks appends the runtime stack into file in dir and returns full path
-// to that file.
-func DumpStacks(dir string) (string, error) {
-	var (
-		buf       []byte
-		stackSize int
-	)
-	bufferLen := 16384
-	for stackSize == len(buf) {
-		buf = make([]byte, bufferLen)
-		stackSize = runtime.Stack(buf, true)
-		bufferLen *= 2
-	}
-	buf = buf[:stackSize]
-	var f *os.File
-	if dir != "" {
-		path := filepath.Join(dir, fmt.Sprintf(stacksLogNameTemplate, strings.Replace(time.Now().Format(time.RFC3339), ":", "", -1)))
-		var err error
-		f, err = os.OpenFile(path, os.O_CREATE|os.O_WRONLY, 0666)
-		if err != nil {
-			return "", errors.Wrap(err, "failed to open file to write the goroutine stacks")
-		}
-		defer f.Close()
-		defer f.Sync()
-	} else {
-		f = os.Stderr
-	}
-	if _, err := f.Write(buf); err != nil {
-		return "", errors.Wrap(err, "failed to write goroutine stacks")
-	}
-	return f.Name(), nil
-}