Initial commit

This commit is contained in:
jeff
2019-03-07 17:08:54 +08:00
commit 47bf8820f4
2817 changed files with 960937 additions and 0 deletions

51
vendor/github.com/docker/docker/pkg/ioutils/buffer.go generated vendored Normal file
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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])
}

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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)
}

22
vendor/github.com/docker/docker/pkg/ioutils/fmt.go generated vendored Normal file
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package ioutils
import (
"fmt"
"io"
)
// FprintfIfNotEmpty prints the string value if it's not empty
func FprintfIfNotEmpty(w io.Writer, format, value string) (int, error) {
if value != "" {
return fmt.Fprintf(w, format, value)
}
return 0, nil
}
// FprintfIfTrue prints the boolean value if it's true
func FprintfIfTrue(w io.Writer, format string, ok bool) (int, error) {
if ok {
return fmt.Fprintf(w, format, ok)
}
return 0, nil
}

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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
}

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package ioutils
import (
"bytes"
"fmt"
"io"
"os"
)
type pos struct {
idx int
offset int64
}
type multiReadSeeker struct {
readers []io.ReadSeeker
pos *pos
posIdx map[io.ReadSeeker]int
}
func (r *multiReadSeeker) Seek(offset int64, whence int) (int64, error) {
var tmpOffset int64
switch whence {
case os.SEEK_SET:
for i, rdr := range r.readers {
// get size of the current reader
s, err := rdr.Seek(0, os.SEEK_END)
if err != nil {
return -1, err
}
if offset > tmpOffset+s {
if i == len(r.readers)-1 {
rdrOffset := s + (offset - tmpOffset)
if _, err := rdr.Seek(rdrOffset, os.SEEK_SET); err != nil {
return -1, err
}
r.pos = &pos{i, rdrOffset}
return offset, nil
}
tmpOffset += s
continue
}
rdrOffset := offset - tmpOffset
idx := i
rdr.Seek(rdrOffset, os.SEEK_SET)
// make sure all following readers are at 0
for _, rdr := range r.readers[i+1:] {
rdr.Seek(0, os.SEEK_SET)
}
if rdrOffset == s && i != len(r.readers)-1 {
idx++
rdrOffset = 0
}
r.pos = &pos{idx, rdrOffset}
return offset, nil
}
case os.SEEK_END:
for _, rdr := range r.readers {
s, err := rdr.Seek(0, os.SEEK_END)
if err != nil {
return -1, err
}
tmpOffset += s
}
r.Seek(tmpOffset+offset, os.SEEK_SET)
return tmpOffset + offset, nil
case os.SEEK_CUR:
if r.pos == nil {
return r.Seek(offset, os.SEEK_SET)
}
// Just return the current offset
if offset == 0 {
return r.getCurOffset()
}
curOffset, err := r.getCurOffset()
if err != nil {
return -1, err
}
rdr, rdrOffset, err := r.getReaderForOffset(curOffset + offset)
if err != nil {
return -1, err
}
r.pos = &pos{r.posIdx[rdr], rdrOffset}
return curOffset + offset, nil
default:
return -1, fmt.Errorf("Invalid whence: %d", whence)
}
return -1, fmt.Errorf("Error seeking for whence: %d, offset: %d", whence, offset)
}
func (r *multiReadSeeker) getReaderForOffset(offset int64) (io.ReadSeeker, int64, error) {
var offsetTo int64
for _, rdr := range r.readers {
size, err := getReadSeekerSize(rdr)
if err != nil {
return nil, -1, err
}
if offsetTo+size > offset {
return rdr, offset - offsetTo, nil
}
if rdr == r.readers[len(r.readers)-1] {
return rdr, offsetTo + offset, nil
}
offsetTo += size
}
return nil, 0, nil
}
func (r *multiReadSeeker) getCurOffset() (int64, error) {
var totalSize int64
for _, rdr := range r.readers[:r.pos.idx+1] {
if r.posIdx[rdr] == r.pos.idx {
totalSize += r.pos.offset
break
}
size, err := getReadSeekerSize(rdr)
if err != nil {
return -1, fmt.Errorf("error getting seeker size: %v", err)
}
totalSize += size
}
return totalSize, nil
}
func (r *multiReadSeeker) getOffsetToReader(rdr io.ReadSeeker) (int64, error) {
var offset int64
for _, r := range r.readers {
if r == rdr {
break
}
size, err := getReadSeekerSize(rdr)
if err != nil {
return -1, err
}
offset += size
}
return offset, nil
}
func (r *multiReadSeeker) Read(b []byte) (int, error) {
if r.pos == nil {
// make sure all readers are at 0
r.Seek(0, os.SEEK_SET)
}
bLen := int64(len(b))
buf := bytes.NewBuffer(nil)
var rdr io.ReadSeeker
for _, rdr = range r.readers[r.pos.idx:] {
readBytes, err := io.CopyN(buf, rdr, bLen)
if err != nil && err != io.EOF {
return -1, err
}
bLen -= readBytes
if bLen == 0 {
break
}
}
rdrPos, err := rdr.Seek(0, os.SEEK_CUR)
if err != nil {
return -1, err
}
r.pos = &pos{r.posIdx[rdr], rdrPos}
return buf.Read(b)
}
func getReadSeekerSize(rdr io.ReadSeeker) (int64, error) {
// save the current position
pos, err := rdr.Seek(0, os.SEEK_CUR)
if err != nil {
return -1, err
}
// get the size
size, err := rdr.Seek(0, os.SEEK_END)
if err != nil {
return -1, err
}
// reset the position
if _, err := rdr.Seek(pos, os.SEEK_SET); err != nil {
return -1, err
}
return size, nil
}
// MultiReadSeeker returns a ReadSeeker that's the logical concatenation of the provided
// input readseekers. After calling this method the initial position is set to the
// beginning of the first ReadSeeker. At the end of a ReadSeeker, Read always advances
// to the beginning of the next ReadSeeker and returns EOF at the end of the last ReadSeeker.
// Seek can be used over the sum of lengths of all readseekers.
//
// When a MultiReadSeeker is used, no Read and Seek operations should be made on
// its ReadSeeker components. Also, users should make no assumption on the state
// of individual readseekers while the MultiReadSeeker is used.
func MultiReadSeeker(readers ...io.ReadSeeker) io.ReadSeeker {
if len(readers) == 1 {
return readers[0]
}
idx := make(map[io.ReadSeeker]int)
for i, rdr := range readers {
idx[rdr] = i
}
return &multiReadSeeker{
readers: readers,
posIdx: idx,
}
}

154
vendor/github.com/docker/docker/pkg/ioutils/readers.go generated vendored Normal file
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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
}

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// +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)
}

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// +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
}

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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{})}
}

66
vendor/github.com/docker/docker/pkg/ioutils/writers.go generated vendored Normal file
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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
}

View File

@@ -0,0 +1,26 @@
// longpath introduces some constants and helper functions for handling long paths
// in Windows, which are expected to be prepended with `\\?\` and followed by either
// a drive letter, a UNC server\share, or a volume identifier.
package longpath
import (
"strings"
)
// Prefix is the longpath prefix for Windows file paths.
const Prefix = `\\?\`
// AddPrefix will add the Windows long path prefix to the path provided if
// it does not already have it.
func AddPrefix(path string) string {
if !strings.HasPrefix(path, Prefix) {
if strings.HasPrefix(path, `\\`) {
// This is a UNC path, so we need to add 'UNC' to the path as well.
path = Prefix + `UNC` + path[1:]
} else {
path = Prefix + path
}
}
return path
}

View File

@@ -0,0 +1,191 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
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communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
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designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
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Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
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or a Contribution incorporated within the Work constitutes direct
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as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
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(d) If the Work includes a "NOTICE" text file as part of its
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of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
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You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
Copyright 2014-2017 Docker, 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.

View File

@@ -0,0 +1,27 @@
Copyright (c) 2014-2017 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.

52
vendor/github.com/docker/docker/pkg/system/chtimes.go generated vendored Normal file
View File

@@ -0,0 +1,52 @@
package system
import (
"os"
"syscall"
"time"
"unsafe"
)
var (
maxTime time.Time
)
func init() {
if unsafe.Sizeof(syscall.Timespec{}.Nsec) == 8 {
// This is a 64 bit timespec
// os.Chtimes limits time to the following
maxTime = time.Unix(0, 1<<63-1)
} else {
// This is a 32 bit timespec
maxTime = time.Unix(1<<31-1, 0)
}
}
// Chtimes changes the access time and modified time of a file at the given path
func Chtimes(name string, atime time.Time, mtime time.Time) error {
unixMinTime := time.Unix(0, 0)
unixMaxTime := maxTime
// If the modified time is prior to the Unix Epoch, or after the
// end of Unix Time, os.Chtimes has undefined behavior
// default to Unix Epoch in this case, just in case
if atime.Before(unixMinTime) || atime.After(unixMaxTime) {
atime = unixMinTime
}
if mtime.Before(unixMinTime) || mtime.After(unixMaxTime) {
mtime = unixMinTime
}
if err := os.Chtimes(name, atime, mtime); err != nil {
return err
}
// Take platform specific action for setting create time.
if err := setCTime(name, mtime); err != nil {
return err
}
return nil
}

View File

@@ -0,0 +1,14 @@
// +build !windows
package system
import (
"time"
)
//setCTime will set the create time on a file. On Unix, the create
//time is updated as a side effect of setting the modified time, so
//no action is required.
func setCTime(path string, ctime time.Time) error {
return nil
}

View File

@@ -0,0 +1,27 @@
// +build windows
package system
import (
"syscall"
"time"
)
//setCTime will set the create time on a file. On Windows, this requires
//calling SetFileTime and explicitly including the create time.
func setCTime(path string, ctime time.Time) error {
ctimespec := syscall.NsecToTimespec(ctime.UnixNano())
pathp, e := syscall.UTF16PtrFromString(path)
if e != nil {
return e
}
h, e := syscall.CreateFile(pathp,
syscall.FILE_WRITE_ATTRIBUTES, syscall.FILE_SHARE_WRITE, nil,
syscall.OPEN_EXISTING, syscall.FILE_FLAG_BACKUP_SEMANTICS, 0)
if e != nil {
return e
}
defer syscall.Close(h)
c := syscall.NsecToFiletime(syscall.TimespecToNsec(ctimespec))
return syscall.SetFileTime(h, &c, nil, nil)
}

10
vendor/github.com/docker/docker/pkg/system/errors.go generated vendored Normal file
View File

@@ -0,0 +1,10 @@
package system
import (
"errors"
)
var (
// ErrNotSupportedPlatform means the platform is not supported.
ErrNotSupportedPlatform = errors.New("platform and architecture is not supported")
)

View File

@@ -0,0 +1,85 @@
package system
// This file implements syscalls for Win32 events which are not implemented
// in golang.
import (
"syscall"
"unsafe"
"golang.org/x/sys/windows"
)
var (
procCreateEvent = modkernel32.NewProc("CreateEventW")
procOpenEvent = modkernel32.NewProc("OpenEventW")
procSetEvent = modkernel32.NewProc("SetEvent")
procResetEvent = modkernel32.NewProc("ResetEvent")
procPulseEvent = modkernel32.NewProc("PulseEvent")
)
// CreateEvent implements win32 CreateEventW func in golang. It will create an event object.
func CreateEvent(eventAttributes *syscall.SecurityAttributes, manualReset bool, initialState bool, name string) (handle syscall.Handle, err error) {
namep, _ := syscall.UTF16PtrFromString(name)
var _p1 uint32
if manualReset {
_p1 = 1
}
var _p2 uint32
if initialState {
_p2 = 1
}
r0, _, e1 := procCreateEvent.Call(uintptr(unsafe.Pointer(eventAttributes)), uintptr(_p1), uintptr(_p2), uintptr(unsafe.Pointer(namep)))
use(unsafe.Pointer(namep))
handle = syscall.Handle(r0)
if handle == syscall.InvalidHandle {
err = e1
}
return
}
// OpenEvent implements win32 OpenEventW func in golang. It opens an event object.
func OpenEvent(desiredAccess uint32, inheritHandle bool, name string) (handle syscall.Handle, err error) {
namep, _ := syscall.UTF16PtrFromString(name)
var _p1 uint32
if inheritHandle {
_p1 = 1
}
r0, _, e1 := procOpenEvent.Call(uintptr(desiredAccess), uintptr(_p1), uintptr(unsafe.Pointer(namep)))
use(unsafe.Pointer(namep))
handle = syscall.Handle(r0)
if handle == syscall.InvalidHandle {
err = e1
}
return
}
// SetEvent implements win32 SetEvent func in golang.
func SetEvent(handle syscall.Handle) (err error) {
return setResetPulse(handle, procSetEvent)
}
// ResetEvent implements win32 ResetEvent func in golang.
func ResetEvent(handle syscall.Handle) (err error) {
return setResetPulse(handle, procResetEvent)
}
// PulseEvent implements win32 PulseEvent func in golang.
func PulseEvent(handle syscall.Handle) (err error) {
return setResetPulse(handle, procPulseEvent)
}
func setResetPulse(handle syscall.Handle, proc *windows.LazyProc) (err error) {
r0, _, _ := proc.Call(uintptr(handle))
if r0 != 0 {
err = syscall.Errno(r0)
}
return
}
var temp unsafe.Pointer
// use ensures a variable is kept alive without the GC freeing while still needed
func use(p unsafe.Pointer) {
temp = p
}

33
vendor/github.com/docker/docker/pkg/system/exitcode.go generated vendored Normal file
View File

@@ -0,0 +1,33 @@
package system
import (
"fmt"
"os/exec"
"syscall"
)
// GetExitCode returns the ExitStatus of the specified error if its type is
// exec.ExitError, returns 0 and an error otherwise.
func GetExitCode(err error) (int, error) {
exitCode := 0
if exiterr, ok := err.(*exec.ExitError); ok {
if procExit, ok := exiterr.Sys().(syscall.WaitStatus); ok {
return procExit.ExitStatus(), nil
}
}
return exitCode, fmt.Errorf("failed to get exit code")
}
// ProcessExitCode process the specified error and returns the exit status code
// if the error was of type exec.ExitError, returns nothing otherwise.
func ProcessExitCode(err error) (exitCode int) {
if err != nil {
var exiterr error
if exitCode, exiterr = GetExitCode(err); exiterr != nil {
// TODO: Fix this so we check the error's text.
// we've failed to retrieve exit code, so we set it to 127
exitCode = 127
}
}
return
}

68
vendor/github.com/docker/docker/pkg/system/filesys.go generated vendored Normal file
View File

@@ -0,0 +1,68 @@
// +build !windows
package system
import (
"io/ioutil"
"os"
"path/filepath"
)
// MkdirAllWithACL is a wrapper for MkdirAll that creates a directory
// ACL'd for Builtin Administrators and Local System.
func MkdirAllWithACL(path string, perm os.FileMode) error {
return MkdirAll(path, perm)
}
// MkdirAll creates a directory named path along with any necessary parents,
// with permission specified by attribute perm for all dir created.
func MkdirAll(path string, perm os.FileMode) error {
return os.MkdirAll(path, perm)
}
// IsAbs is a platform-specific wrapper for filepath.IsAbs.
func IsAbs(path string) bool {
return filepath.IsAbs(path)
}
// The functions below here are wrappers for the equivalents in the os and ioutils packages.
// They are passthrough on Unix platforms, and only relevant on Windows.
// CreateSequential creates the named file with mode 0666 (before umask), truncating
// it if it already exists. If successful, methods on the returned
// File can be used for I/O; the associated file descriptor has mode
// O_RDWR.
// If there is an error, it will be of type *PathError.
func CreateSequential(name string) (*os.File, error) {
return os.Create(name)
}
// OpenSequential opens the named file for reading. If successful, methods on
// the returned file can be used for reading; the associated file
// descriptor has mode O_RDONLY.
// If there is an error, it will be of type *PathError.
func OpenSequential(name string) (*os.File, error) {
return os.Open(name)
}
// OpenFileSequential is the generalized open call; most users will use Open
// or Create instead. It opens the named file with specified flag
// (O_RDONLY etc.) and perm, (0666 etc.) if applicable. If successful,
// methods on the returned File can be used for I/O.
// If there is an error, it will be of type *PathError.
func OpenFileSequential(name string, flag int, perm os.FileMode) (*os.File, error) {
return os.OpenFile(name, flag, perm)
}
// TempFileSequential creates a new temporary file in the directory dir
// with a name beginning with prefix, opens the file for reading
// and writing, and returns the resulting *os.File.
// If dir is the empty string, TempFile uses the default directory
// for temporary files (see os.TempDir).
// Multiple programs calling TempFile simultaneously
// will not choose the same file. The caller can use f.Name()
// to find the pathname of the file. It is the caller's responsibility
// to remove the file when no longer needed.
func TempFileSequential(dir, prefix string) (f *os.File, err error) {
return ioutil.TempFile(dir, prefix)
}

View File

@@ -0,0 +1,291 @@
// +build windows
package system
import (
"os"
"path/filepath"
"regexp"
"strconv"
"strings"
"sync"
"syscall"
"time"
"unsafe"
winio "github.com/Microsoft/go-winio"
)
// MkdirAllWithACL is a wrapper for MkdirAll that creates a directory
// ACL'd for Builtin Administrators and Local System.
func MkdirAllWithACL(path string, perm os.FileMode) error {
return mkdirall(path, true)
}
// MkdirAll implementation that is volume path aware for Windows.
func MkdirAll(path string, _ os.FileMode) error {
return mkdirall(path, false)
}
// mkdirall is a custom version of os.MkdirAll modified for use on Windows
// so that it is both volume path aware, and can create a directory with
// a DACL.
func mkdirall(path string, adminAndLocalSystem bool) error {
if re := regexp.MustCompile(`^\\\\\?\\Volume{[a-z0-9-]+}$`); re.MatchString(path) {
return nil
}
// The rest of this method is largely copied from os.MkdirAll and should be kept
// as-is to ensure compatibility.
// Fast path: if we can tell whether path is a directory or file, stop with success or error.
dir, err := os.Stat(path)
if err == nil {
if dir.IsDir() {
return nil
}
return &os.PathError{
Op: "mkdir",
Path: path,
Err: syscall.ENOTDIR,
}
}
// Slow path: make sure parent exists and then call Mkdir for path.
i := len(path)
for i > 0 && os.IsPathSeparator(path[i-1]) { // Skip trailing path separator.
i--
}
j := i
for j > 0 && !os.IsPathSeparator(path[j-1]) { // Scan backward over element.
j--
}
if j > 1 {
// Create parent
err = mkdirall(path[0:j-1], false)
if err != nil {
return err
}
}
// Parent now exists; invoke os.Mkdir or mkdirWithACL and use its result.
if adminAndLocalSystem {
err = mkdirWithACL(path)
} else {
err = os.Mkdir(path, 0)
}
if err != nil {
// Handle arguments like "foo/." by
// double-checking that directory doesn't exist.
dir, err1 := os.Lstat(path)
if err1 == nil && dir.IsDir() {
return nil
}
return err
}
return nil
}
// mkdirWithACL creates a new directory. If there is an error, it will be of
// type *PathError. .
//
// This is a modified and combined version of os.Mkdir and syscall.Mkdir
// in golang to cater for creating a directory am ACL permitting full
// access, with inheritance, to any subfolder/file for Built-in Administrators
// and Local System.
func mkdirWithACL(name string) error {
sa := syscall.SecurityAttributes{Length: 0}
sddl := "D:P(A;OICI;GA;;;BA)(A;OICI;GA;;;SY)"
sd, err := winio.SddlToSecurityDescriptor(sddl)
if err != nil {
return &os.PathError{Op: "mkdir", Path: name, Err: err}
}
sa.Length = uint32(unsafe.Sizeof(sa))
sa.InheritHandle = 1
sa.SecurityDescriptor = uintptr(unsafe.Pointer(&sd[0]))
namep, err := syscall.UTF16PtrFromString(name)
if err != nil {
return &os.PathError{Op: "mkdir", Path: name, Err: err}
}
e := syscall.CreateDirectory(namep, &sa)
if e != nil {
return &os.PathError{Op: "mkdir", Path: name, Err: e}
}
return nil
}
// IsAbs is a platform-specific wrapper for filepath.IsAbs. On Windows,
// golang filepath.IsAbs does not consider a path \windows\system32 as absolute
// as it doesn't start with a drive-letter/colon combination. However, in
// docker we need to verify things such as WORKDIR /windows/system32 in
// a Dockerfile (which gets translated to \windows\system32 when being processed
// by the daemon. This SHOULD be treated as absolute from a docker processing
// perspective.
func IsAbs(path string) bool {
if !filepath.IsAbs(path) {
if !strings.HasPrefix(path, string(os.PathSeparator)) {
return false
}
}
return true
}
// The origin of the functions below here are the golang OS and syscall packages,
// slightly modified to only cope with files, not directories due to the
// specific use case.
//
// The alteration is to allow a file on Windows to be opened with
// FILE_FLAG_SEQUENTIAL_SCAN (particular for docker load), to avoid eating
// the standby list, particularly when accessing large files such as layer.tar.
// CreateSequential creates the named file with mode 0666 (before umask), truncating
// it if it already exists. If successful, methods on the returned
// File can be used for I/O; the associated file descriptor has mode
// O_RDWR.
// If there is an error, it will be of type *PathError.
func CreateSequential(name string) (*os.File, error) {
return OpenFileSequential(name, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0)
}
// OpenSequential opens the named file for reading. If successful, methods on
// the returned file can be used for reading; the associated file
// descriptor has mode O_RDONLY.
// If there is an error, it will be of type *PathError.
func OpenSequential(name string) (*os.File, error) {
return OpenFileSequential(name, os.O_RDONLY, 0)
}
// OpenFileSequential is the generalized open call; most users will use Open
// or Create instead.
// If there is an error, it will be of type *PathError.
func OpenFileSequential(name string, flag int, _ os.FileMode) (*os.File, error) {
if name == "" {
return nil, &os.PathError{Op: "open", Path: name, Err: syscall.ENOENT}
}
r, errf := syscallOpenFileSequential(name, flag, 0)
if errf == nil {
return r, nil
}
return nil, &os.PathError{Op: "open", Path: name, Err: errf}
}
func syscallOpenFileSequential(name string, flag int, _ os.FileMode) (file *os.File, err error) {
r, e := syscallOpenSequential(name, flag|syscall.O_CLOEXEC, 0)
if e != nil {
return nil, e
}
return os.NewFile(uintptr(r), name), nil
}
func makeInheritSa() *syscall.SecurityAttributes {
var sa syscall.SecurityAttributes
sa.Length = uint32(unsafe.Sizeof(sa))
sa.InheritHandle = 1
return &sa
}
func syscallOpenSequential(path string, mode int, _ uint32) (fd syscall.Handle, err error) {
if len(path) == 0 {
return syscall.InvalidHandle, syscall.ERROR_FILE_NOT_FOUND
}
pathp, err := syscall.UTF16PtrFromString(path)
if err != nil {
return syscall.InvalidHandle, err
}
var access uint32
switch mode & (syscall.O_RDONLY | syscall.O_WRONLY | syscall.O_RDWR) {
case syscall.O_RDONLY:
access = syscall.GENERIC_READ
case syscall.O_WRONLY:
access = syscall.GENERIC_WRITE
case syscall.O_RDWR:
access = syscall.GENERIC_READ | syscall.GENERIC_WRITE
}
if mode&syscall.O_CREAT != 0 {
access |= syscall.GENERIC_WRITE
}
if mode&syscall.O_APPEND != 0 {
access &^= syscall.GENERIC_WRITE
access |= syscall.FILE_APPEND_DATA
}
sharemode := uint32(syscall.FILE_SHARE_READ | syscall.FILE_SHARE_WRITE)
var sa *syscall.SecurityAttributes
if mode&syscall.O_CLOEXEC == 0 {
sa = makeInheritSa()
}
var createmode uint32
switch {
case mode&(syscall.O_CREAT|syscall.O_EXCL) == (syscall.O_CREAT | syscall.O_EXCL):
createmode = syscall.CREATE_NEW
case mode&(syscall.O_CREAT|syscall.O_TRUNC) == (syscall.O_CREAT | syscall.O_TRUNC):
createmode = syscall.CREATE_ALWAYS
case mode&syscall.O_CREAT == syscall.O_CREAT:
createmode = syscall.OPEN_ALWAYS
case mode&syscall.O_TRUNC == syscall.O_TRUNC:
createmode = syscall.TRUNCATE_EXISTING
default:
createmode = syscall.OPEN_EXISTING
}
// Use FILE_FLAG_SEQUENTIAL_SCAN rather than FILE_ATTRIBUTE_NORMAL as implemented in golang.
//https://msdn.microsoft.com/en-us/library/windows/desktop/aa363858(v=vs.85).aspx
const fileFlagSequentialScan = 0x08000000 // FILE_FLAG_SEQUENTIAL_SCAN
h, e := syscall.CreateFile(pathp, access, sharemode, sa, createmode, fileFlagSequentialScan, 0)
return h, e
}
// Helpers for TempFileSequential
var rand uint32
var randmu sync.Mutex
func reseed() uint32 {
return uint32(time.Now().UnixNano() + int64(os.Getpid()))
}
func nextSuffix() string {
randmu.Lock()
r := rand
if r == 0 {
r = reseed()
}
r = r*1664525 + 1013904223 // constants from Numerical Recipes
rand = r
randmu.Unlock()
return strconv.Itoa(int(1e9 + r%1e9))[1:]
}
// TempFileSequential is a copy of ioutil.TempFile, modified to use sequential
// file access. Below is the original comment from golang:
// TempFile creates a new temporary file in the directory dir
// with a name beginning with prefix, opens the file for reading
// and writing, and returns the resulting *os.File.
// If dir is the empty string, TempFile uses the default directory
// for temporary files (see os.TempDir).
// Multiple programs calling TempFile simultaneously
// will not choose the same file. The caller can use f.Name()
// to find the pathname of the file. It is the caller's responsibility
// to remove the file when no longer needed.
func TempFileSequential(dir, prefix string) (f *os.File, err error) {
if dir == "" {
dir = os.TempDir()
}
nconflict := 0
for i := 0; i < 10000; i++ {
name := filepath.Join(dir, prefix+nextSuffix())
f, err = OpenFileSequential(name, os.O_RDWR|os.O_CREATE|os.O_EXCL, 0600)
if os.IsExist(err) {
if nconflict++; nconflict > 10 {
randmu.Lock()
rand = reseed()
randmu.Unlock()
}
continue
}
break
}
return
}

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@@ -0,0 +1,17 @@
// +build !windows
package system
import "syscall"
// Lstat takes a path to a file and returns
// a system.StatT type pertaining to that file.
//
// Throws an error if the file does not exist
func Lstat(path string) (*StatT, error) {
s := &syscall.Stat_t{}
if err := syscall.Lstat(path, s); err != nil {
return nil, err
}
return fromStatT(s)
}

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@@ -0,0 +1,14 @@
package system
import "os"
// Lstat calls os.Lstat to get a fileinfo interface back.
// This is then copied into our own locally defined structure.
func Lstat(path string) (*StatT, error) {
fi, err := os.Lstat(path)
if err != nil {
return nil, err
}
return fromStatT(&fi)
}

17
vendor/github.com/docker/docker/pkg/system/meminfo.go generated vendored Normal file
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@@ -0,0 +1,17 @@
package system
// MemInfo contains memory statistics of the host system.
type MemInfo struct {
// Total usable RAM (i.e. physical RAM minus a few reserved bits and the
// kernel binary code).
MemTotal int64
// Amount of free memory.
MemFree int64
// Total amount of swap space available.
SwapTotal int64
// Amount of swap space that is currently unused.
SwapFree int64
}

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@@ -0,0 +1,65 @@
package system
import (
"bufio"
"io"
"os"
"strconv"
"strings"
"github.com/docker/go-units"
)
// ReadMemInfo retrieves memory statistics of the host system and returns a
// MemInfo type.
func ReadMemInfo() (*MemInfo, error) {
file, err := os.Open("/proc/meminfo")
if err != nil {
return nil, err
}
defer file.Close()
return parseMemInfo(file)
}
// parseMemInfo parses the /proc/meminfo file into
// a MemInfo object given an io.Reader to the file.
// Throws error if there are problems reading from the file
func parseMemInfo(reader io.Reader) (*MemInfo, error) {
meminfo := &MemInfo{}
scanner := bufio.NewScanner(reader)
for scanner.Scan() {
// Expected format: ["MemTotal:", "1234", "kB"]
parts := strings.Fields(scanner.Text())
// Sanity checks: Skip malformed entries.
if len(parts) < 3 || parts[2] != "kB" {
continue
}
// Convert to bytes.
size, err := strconv.Atoi(parts[1])
if err != nil {
continue
}
bytes := int64(size) * units.KiB
switch parts[0] {
case "MemTotal:":
meminfo.MemTotal = bytes
case "MemFree:":
meminfo.MemFree = bytes
case "SwapTotal:":
meminfo.SwapTotal = bytes
case "SwapFree:":
meminfo.SwapFree = bytes
}
}
// Handle errors that may have occurred during the reading of the file.
if err := scanner.Err(); err != nil {
return nil, err
}
return meminfo, nil
}

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@@ -0,0 +1,129 @@
// +build solaris,cgo
package system
import (
"fmt"
"unsafe"
)
// #cgo CFLAGS: -std=c99
// #cgo LDFLAGS: -lkstat
// #include <unistd.h>
// #include <stdlib.h>
// #include <stdio.h>
// #include <kstat.h>
// #include <sys/swap.h>
// #include <sys/param.h>
// struct swaptable *allocSwaptable(int num) {
// struct swaptable *st;
// struct swapent *swapent;
// st = (struct swaptable *)malloc(num * sizeof(swapent_t) + sizeof (int));
// swapent = st->swt_ent;
// for (int i = 0; i < num; i++,swapent++) {
// swapent->ste_path = (char *)malloc(MAXPATHLEN * sizeof (char));
// }
// st->swt_n = num;
// return st;
//}
// void freeSwaptable (struct swaptable *st) {
// struct swapent *swapent = st->swt_ent;
// for (int i = 0; i < st->swt_n; i++,swapent++) {
// free(swapent->ste_path);
// }
// free(st);
// }
// swapent_t getSwapEnt(swapent_t *ent, int i) {
// return ent[i];
// }
// int64_t getPpKernel() {
// int64_t pp_kernel = 0;
// kstat_ctl_t *ksc;
// kstat_t *ks;
// kstat_named_t *knp;
// kid_t kid;
//
// if ((ksc = kstat_open()) == NULL) {
// return -1;
// }
// if ((ks = kstat_lookup(ksc, "unix", 0, "system_pages")) == NULL) {
// return -1;
// }
// if (((kid = kstat_read(ksc, ks, NULL)) == -1) ||
// ((knp = kstat_data_lookup(ks, "pp_kernel")) == NULL)) {
// return -1;
// }
// switch (knp->data_type) {
// case KSTAT_DATA_UINT64:
// pp_kernel = knp->value.ui64;
// break;
// case KSTAT_DATA_UINT32:
// pp_kernel = knp->value.ui32;
// break;
// }
// pp_kernel *= sysconf(_SC_PAGESIZE);
// return (pp_kernel > 0 ? pp_kernel : -1);
// }
import "C"
// Get the system memory info using sysconf same as prtconf
func getTotalMem() int64 {
pagesize := C.sysconf(C._SC_PAGESIZE)
npages := C.sysconf(C._SC_PHYS_PAGES)
return int64(pagesize * npages)
}
func getFreeMem() int64 {
pagesize := C.sysconf(C._SC_PAGESIZE)
npages := C.sysconf(C._SC_AVPHYS_PAGES)
return int64(pagesize * npages)
}
// ReadMemInfo retrieves memory statistics of the host system and returns a
// MemInfo type.
func ReadMemInfo() (*MemInfo, error) {
ppKernel := C.getPpKernel()
MemTotal := getTotalMem()
MemFree := getFreeMem()
SwapTotal, SwapFree, err := getSysSwap()
if ppKernel < 0 || MemTotal < 0 || MemFree < 0 || SwapTotal < 0 ||
SwapFree < 0 {
return nil, fmt.Errorf("error getting system memory info %v\n", err)
}
meminfo := &MemInfo{}
// Total memory is total physical memory less than memory locked by kernel
meminfo.MemTotal = MemTotal - int64(ppKernel)
meminfo.MemFree = MemFree
meminfo.SwapTotal = SwapTotal
meminfo.SwapFree = SwapFree
return meminfo, nil
}
func getSysSwap() (int64, int64, error) {
var tSwap int64
var fSwap int64
var diskblksPerPage int64
num, err := C.swapctl(C.SC_GETNSWP, nil)
if err != nil {
return -1, -1, err
}
st := C.allocSwaptable(num)
_, err = C.swapctl(C.SC_LIST, unsafe.Pointer(st))
if err != nil {
C.freeSwaptable(st)
return -1, -1, err
}
diskblksPerPage = int64(C.sysconf(C._SC_PAGESIZE) >> C.DEV_BSHIFT)
for i := 0; i < int(num); i++ {
swapent := C.getSwapEnt(&st.swt_ent[0], C.int(i))
tSwap += int64(swapent.ste_pages) * diskblksPerPage
fSwap += int64(swapent.ste_free) * diskblksPerPage
}
C.freeSwaptable(st)
return tSwap, fSwap, nil
}

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@@ -0,0 +1,8 @@
// +build !linux,!windows,!solaris
package system
// ReadMemInfo is not supported on platforms other than linux and windows.
func ReadMemInfo() (*MemInfo, error) {
return nil, ErrNotSupportedPlatform
}

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@@ -0,0 +1,45 @@
package system
import (
"unsafe"
"golang.org/x/sys/windows"
)
var (
modkernel32 = windows.NewLazySystemDLL("kernel32.dll")
procGlobalMemoryStatusEx = modkernel32.NewProc("GlobalMemoryStatusEx")
)
// https://msdn.microsoft.com/en-us/library/windows/desktop/aa366589(v=vs.85).aspx
// https://msdn.microsoft.com/en-us/library/windows/desktop/aa366770(v=vs.85).aspx
type memorystatusex struct {
dwLength uint32
dwMemoryLoad uint32
ullTotalPhys uint64
ullAvailPhys uint64
ullTotalPageFile uint64
ullAvailPageFile uint64
ullTotalVirtual uint64
ullAvailVirtual uint64
ullAvailExtendedVirtual uint64
}
// ReadMemInfo retrieves memory statistics of the host system and returns a
// MemInfo type.
func ReadMemInfo() (*MemInfo, error) {
msi := &memorystatusex{
dwLength: 64,
}
r1, _, _ := procGlobalMemoryStatusEx.Call(uintptr(unsafe.Pointer(msi)))
if r1 == 0 {
return &MemInfo{}, nil
}
return &MemInfo{
MemTotal: int64(msi.ullTotalPhys),
MemFree: int64(msi.ullAvailPhys),
SwapTotal: int64(msi.ullTotalPageFile),
SwapFree: int64(msi.ullAvailPageFile),
}, nil
}

22
vendor/github.com/docker/docker/pkg/system/mknod.go generated vendored Normal file
View File

@@ -0,0 +1,22 @@
// +build !windows
package system
import (
"syscall"
)
// Mknod creates a filesystem node (file, device special file or named pipe) named path
// with attributes specified by mode and dev.
func Mknod(path string, mode uint32, dev int) error {
return syscall.Mknod(path, mode, dev)
}
// Mkdev is used to build the value of linux devices (in /dev/) which specifies major
// and minor number of the newly created device special file.
// Linux device nodes are a bit weird due to backwards compat with 16 bit device nodes.
// They are, from low to high: the lower 8 bits of the minor, then 12 bits of the major,
// then the top 12 bits of the minor.
func Mkdev(major int64, minor int64) uint32 {
return uint32(((minor & 0xfff00) << 12) | ((major & 0xfff) << 8) | (minor & 0xff))
}

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@@ -0,0 +1,13 @@
// +build windows
package system
// Mknod is not implemented on Windows.
func Mknod(path string, mode uint32, dev int) error {
return ErrNotSupportedPlatform
}
// Mkdev is not implemented on Windows.
func Mkdev(major int64, minor int64) uint32 {
panic("Mkdev not implemented on Windows.")
}

View File

@@ -0,0 +1,14 @@
// +build !windows
package system
// DefaultPathEnv is unix style list of directories to search for
// executables. Each directory is separated from the next by a colon
// ':' character .
const DefaultPathEnv = "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
// CheckSystemDriveAndRemoveDriveLetter verifies that a path, if it includes a drive letter,
// is the system drive. This is a no-op on Linux.
func CheckSystemDriveAndRemoveDriveLetter(path string) (string, error) {
return path, nil
}

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@@ -0,0 +1,37 @@
// +build windows
package system
import (
"fmt"
"path/filepath"
"strings"
)
// DefaultPathEnv is deliberately empty on Windows as the default path will be set by
// the container. Docker has no context of what the default path should be.
const DefaultPathEnv = ""
// CheckSystemDriveAndRemoveDriveLetter verifies and manipulates a Windows path.
// This is used, for example, when validating a user provided path in docker cp.
// If a drive letter is supplied, it must be the system drive. The drive letter
// is always removed. Also, it translates it to OS semantics (IOW / to \). We
// need the path in this syntax so that it can ultimately be contatenated with
// a Windows long-path which doesn't support drive-letters. Examples:
// C: --> Fail
// C:\ --> \
// a --> a
// /a --> \a
// d:\ --> Fail
func CheckSystemDriveAndRemoveDriveLetter(path string) (string, error) {
if len(path) == 2 && string(path[1]) == ":" {
return "", fmt.Errorf("No relative path specified in %q", path)
}
if !filepath.IsAbs(path) || len(path) < 2 {
return filepath.FromSlash(path), nil
}
if string(path[1]) == ":" && !strings.EqualFold(string(path[0]), "c") {
return "", fmt.Errorf("The specified path is not on the system drive (C:)")
}
return filepath.FromSlash(path[2:]), nil
}

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@@ -0,0 +1,22 @@
// +build linux freebsd solaris darwin
package system
import (
"syscall"
)
// IsProcessAlive returns true if process with a given pid is running.
func IsProcessAlive(pid int) bool {
err := syscall.Kill(pid, syscall.Signal(0))
if err == nil || err == syscall.EPERM {
return true
}
return false
}
// KillProcess force-stops a process.
func KillProcess(pid int) {
syscall.Kill(pid, syscall.SIGKILL)
}

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@@ -0,0 +1,13 @@
package system
import "syscall"
// fromStatT converts a syscall.Stat_t type to a system.Stat_t type
func fromStatT(s *syscall.Stat_t) (*StatT, error) {
return &StatT{size: s.Size,
mode: uint32(s.Mode),
uid: s.Uid,
gid: s.Gid,
rdev: uint64(s.Rdev),
mtim: s.Mtimespec}, nil
}

View File

@@ -0,0 +1,13 @@
package system
import "syscall"
// fromStatT converts a syscall.Stat_t type to a system.Stat_t type
func fromStatT(s *syscall.Stat_t) (*StatT, error) {
return &StatT{size: s.Size,
mode: uint32(s.Mode),
uid: s.Uid,
gid: s.Gid,
rdev: uint64(s.Rdev),
mtim: s.Mtimespec}, nil
}

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@@ -0,0 +1,19 @@
package system
import "syscall"
// fromStatT converts a syscall.Stat_t type to a system.Stat_t type
func fromStatT(s *syscall.Stat_t) (*StatT, error) {
return &StatT{size: s.Size,
mode: uint32(s.Mode),
uid: s.Uid,
gid: s.Gid,
rdev: uint64(s.Rdev),
mtim: s.Mtim}, nil
}
// FromStatT converts a syscall.Stat_t type to a system.Stat_t type
// This is exposed on Linux as pkg/archive/changes uses it.
func FromStatT(s *syscall.Stat_t) (*StatT, error) {
return fromStatT(s)
}

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@@ -0,0 +1,13 @@
package system
import "syscall"
// fromStatT converts a syscall.Stat_t type to a system.Stat_t type
func fromStatT(s *syscall.Stat_t) (*StatT, error) {
return &StatT{size: s.Size,
mode: uint32(s.Mode),
uid: s.Uid,
gid: s.Gid,
rdev: uint64(s.Rdev),
mtim: s.Mtim}, nil
}

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@@ -0,0 +1,13 @@
package system
import "syscall"
// fromStatT converts a syscall.Stat_t type to a system.Stat_t type
func fromStatT(s *syscall.Stat_t) (*StatT, error) {
return &StatT{size: s.Size,
mode: uint32(s.Mode),
uid: s.Uid,
gid: s.Gid,
rdev: uint64(s.Rdev),
mtim: s.Mtim}, nil
}

View File

@@ -0,0 +1,58 @@
// +build !windows
package system
import "syscall"
// StatT type contains status of a file. It contains metadata
// like permission, owner, group, size, etc about a file.
type StatT struct {
mode uint32
uid uint32
gid uint32
rdev uint64
size int64
mtim syscall.Timespec
}
// Mode returns file's permission mode.
func (s StatT) Mode() uint32 {
return s.mode
}
// UID returns file's user id of owner.
func (s StatT) UID() uint32 {
return s.uid
}
// GID returns file's group id of owner.
func (s StatT) GID() uint32 {
return s.gid
}
// Rdev returns file's device ID (if it's special file).
func (s StatT) Rdev() uint64 {
return s.rdev
}
// Size returns file's size.
func (s StatT) Size() int64 {
return s.size
}
// Mtim returns file's last modification time.
func (s StatT) Mtim() syscall.Timespec {
return s.mtim
}
// Stat takes a path to a file and returns
// a system.StatT type pertaining to that file.
//
// Throws an error if the file does not exist
func Stat(path string) (*StatT, error) {
s := &syscall.Stat_t{}
if err := syscall.Stat(path, s); err != nil {
return nil, err
}
return fromStatT(s)
}

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@@ -0,0 +1,49 @@
package system
import (
"os"
"time"
)
// StatT type contains status of a file. It contains metadata
// like permission, size, etc about a file.
type StatT struct {
mode os.FileMode
size int64
mtim time.Time
}
// Size returns file's size.
func (s StatT) Size() int64 {
return s.size
}
// Mode returns file's permission mode.
func (s StatT) Mode() os.FileMode {
return os.FileMode(s.mode)
}
// Mtim returns file's last modification time.
func (s StatT) Mtim() time.Time {
return time.Time(s.mtim)
}
// Stat takes a path to a file and returns
// a system.StatT type pertaining to that file.
//
// Throws an error if the file does not exist
func Stat(path string) (*StatT, error) {
fi, err := os.Stat(path)
if err != nil {
return nil, err
}
return fromStatT(&fi)
}
// fromStatT converts a os.FileInfo type to a system.StatT type
func fromStatT(fi *os.FileInfo) (*StatT, error) {
return &StatT{
size: (*fi).Size(),
mode: (*fi).Mode(),
mtim: (*fi).ModTime()}, nil
}

View File

@@ -0,0 +1,17 @@
// +build linux freebsd
package system
import "syscall"
// Unmount is a platform-specific helper function to call
// the unmount syscall.
func Unmount(dest string) error {
return syscall.Unmount(dest, 0)
}
// CommandLineToArgv should not be used on Unix.
// It simply returns commandLine in the only element in the returned array.
func CommandLineToArgv(commandLine string) ([]string, error) {
return []string{commandLine}, nil
}

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@@ -0,0 +1,105 @@
package system
import (
"syscall"
"unsafe"
"github.com/Sirupsen/logrus"
)
var (
ntuserApiset = syscall.NewLazyDLL("ext-ms-win-ntuser-window-l1-1-0")
procGetVersionExW = modkernel32.NewProc("GetVersionExW")
)
// OSVersion is a wrapper for Windows version information
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms724439(v=vs.85).aspx
type OSVersion struct {
Version uint32
MajorVersion uint8
MinorVersion uint8
Build uint16
}
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms724833(v=vs.85).aspx
type osVersionInfoEx struct {
OSVersionInfoSize uint32
MajorVersion uint32
MinorVersion uint32
BuildNumber uint32
PlatformID uint32
CSDVersion [128]uint16
ServicePackMajor uint16
ServicePackMinor uint16
SuiteMask uint16
ProductType byte
Reserve byte
}
// GetOSVersion gets the operating system version on Windows. Note that
// docker.exe must be manifested to get the correct version information.
func GetOSVersion() OSVersion {
var err error
osv := OSVersion{}
osv.Version, err = syscall.GetVersion()
if err != nil {
// GetVersion never fails.
panic(err)
}
osv.MajorVersion = uint8(osv.Version & 0xFF)
osv.MinorVersion = uint8(osv.Version >> 8 & 0xFF)
osv.Build = uint16(osv.Version >> 16)
return osv
}
// IsWindowsClient returns true if the SKU is client
// @engine maintainers - this function should not be removed or modified as it
// is used to enforce licensing restrictions on Windows.
func IsWindowsClient() bool {
osviex := &osVersionInfoEx{OSVersionInfoSize: 284}
r1, _, err := procGetVersionExW.Call(uintptr(unsafe.Pointer(osviex)))
if r1 == 0 {
logrus.Warnf("GetVersionExW failed - assuming server SKU: %v", err)
return false
}
const verNTWorkstation = 0x00000001
return osviex.ProductType == verNTWorkstation
}
// Unmount is a platform-specific helper function to call
// the unmount syscall. Not supported on Windows
func Unmount(dest string) error {
return nil
}
// CommandLineToArgv wraps the Windows syscall to turn a commandline into an argument array.
func CommandLineToArgv(commandLine string) ([]string, error) {
var argc int32
argsPtr, err := syscall.UTF16PtrFromString(commandLine)
if err != nil {
return nil, err
}
argv, err := syscall.CommandLineToArgv(argsPtr, &argc)
if err != nil {
return nil, err
}
defer syscall.LocalFree(syscall.Handle(uintptr(unsafe.Pointer(argv))))
newArgs := make([]string, argc)
for i, v := range (*argv)[:argc] {
newArgs[i] = string(syscall.UTF16ToString((*v)[:]))
}
return newArgs, nil
}
// HasWin32KSupport determines whether containers that depend on win32k can
// run on this machine. Win32k is the driver used to implement windowing.
func HasWin32KSupport() bool {
// For now, check for ntuser API support on the host. In the future, a host
// may support win32k in containers even if the host does not support ntuser
// APIs.
return ntuserApiset.Load() == nil
}

13
vendor/github.com/docker/docker/pkg/system/umask.go generated vendored Normal file
View File

@@ -0,0 +1,13 @@
// +build !windows
package system
import (
"syscall"
)
// Umask sets current process's file mode creation mask to newmask
// and returns oldmask.
func Umask(newmask int) (oldmask int, err error) {
return syscall.Umask(newmask), nil
}

View File

@@ -0,0 +1,9 @@
// +build windows
package system
// Umask is not supported on the windows platform.
func Umask(newmask int) (oldmask int, err error) {
// should not be called on cli code path
return 0, ErrNotSupportedPlatform
}

View File

@@ -0,0 +1,22 @@
package system
import (
"syscall"
"unsafe"
)
// LUtimesNano is used to change access and modification time of the specified path.
// It's used for symbol link file because syscall.UtimesNano doesn't support a NOFOLLOW flag atm.
func LUtimesNano(path string, ts []syscall.Timespec) error {
var _path *byte
_path, err := syscall.BytePtrFromString(path)
if err != nil {
return err
}
if _, _, err := syscall.Syscall(syscall.SYS_LUTIMES, uintptr(unsafe.Pointer(_path)), uintptr(unsafe.Pointer(&ts[0])), 0); err != 0 && err != syscall.ENOSYS {
return err
}
return nil
}

View File

@@ -0,0 +1,26 @@
package system
import (
"syscall"
"unsafe"
)
// LUtimesNano is used to change access and modification time of the specified path.
// It's used for symbol link file because syscall.UtimesNano doesn't support a NOFOLLOW flag atm.
func LUtimesNano(path string, ts []syscall.Timespec) error {
// These are not currently available in syscall
atFdCwd := -100
atSymLinkNoFollow := 0x100
var _path *byte
_path, err := syscall.BytePtrFromString(path)
if err != nil {
return err
}
if _, _, err := syscall.Syscall6(syscall.SYS_UTIMENSAT, uintptr(atFdCwd), uintptr(unsafe.Pointer(_path)), uintptr(unsafe.Pointer(&ts[0])), uintptr(atSymLinkNoFollow), 0, 0); err != 0 && err != syscall.ENOSYS {
return err
}
return nil
}

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@@ -0,0 +1,10 @@
// +build !linux,!freebsd
package system
import "syscall"
// LUtimesNano is only supported on linux and freebsd.
func LUtimesNano(path string, ts []syscall.Timespec) error {
return ErrNotSupportedPlatform
}

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@@ -0,0 +1,63 @@
package system
import (
"syscall"
"unsafe"
)
// Lgetxattr retrieves the value of the extended attribute identified by attr
// and associated with the given path in the file system.
// It will returns a nil slice and nil error if the xattr is not set.
func Lgetxattr(path string, attr string) ([]byte, error) {
pathBytes, err := syscall.BytePtrFromString(path)
if err != nil {
return nil, err
}
attrBytes, err := syscall.BytePtrFromString(attr)
if err != nil {
return nil, err
}
dest := make([]byte, 128)
destBytes := unsafe.Pointer(&dest[0])
sz, _, errno := syscall.Syscall6(syscall.SYS_LGETXATTR, uintptr(unsafe.Pointer(pathBytes)), uintptr(unsafe.Pointer(attrBytes)), uintptr(destBytes), uintptr(len(dest)), 0, 0)
if errno == syscall.ENODATA {
return nil, nil
}
if errno == syscall.ERANGE {
dest = make([]byte, sz)
destBytes := unsafe.Pointer(&dest[0])
sz, _, errno = syscall.Syscall6(syscall.SYS_LGETXATTR, uintptr(unsafe.Pointer(pathBytes)), uintptr(unsafe.Pointer(attrBytes)), uintptr(destBytes), uintptr(len(dest)), 0, 0)
}
if errno != 0 {
return nil, errno
}
return dest[:sz], nil
}
var _zero uintptr
// Lsetxattr sets the value of the extended attribute identified by attr
// and associated with the given path in the file system.
func Lsetxattr(path string, attr string, data []byte, flags int) error {
pathBytes, err := syscall.BytePtrFromString(path)
if err != nil {
return err
}
attrBytes, err := syscall.BytePtrFromString(attr)
if err != nil {
return err
}
var dataBytes unsafe.Pointer
if len(data) > 0 {
dataBytes = unsafe.Pointer(&data[0])
} else {
dataBytes = unsafe.Pointer(&_zero)
}
_, _, errno := syscall.Syscall6(syscall.SYS_LSETXATTR, uintptr(unsafe.Pointer(pathBytes)), uintptr(unsafe.Pointer(attrBytes)), uintptr(dataBytes), uintptr(len(data)), uintptr(flags), 0)
if errno != 0 {
return errno
}
return nil
}

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@@ -0,0 +1,13 @@
// +build !linux
package system
// Lgetxattr is not supported on platforms other than linux.
func Lgetxattr(path string, attr string) ([]byte, error) {
return nil, ErrNotSupportedPlatform
}
// Lsetxattr is not supported on platforms other than linux.
func Lsetxattr(path string, attr string, data []byte, flags int) error {
return ErrNotSupportedPlatform
}

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@@ -0,0 +1,11 @@
// +build go1.8
package tlsconfig
import "crypto/tls"
// Clone returns a clone of tls.Config. This function is provided for
// compatibility for go1.7 that doesn't include this method in stdlib.
func Clone(c *tls.Config) *tls.Config {
return c.Clone()
}

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@@ -0,0 +1,31 @@
// +build go1.6,!go1.7
package tlsconfig
import "crypto/tls"
// Clone returns a clone of tls.Config. This function is provided for
// compatibility for go1.6 that doesn't include this method in stdlib.
func Clone(c *tls.Config) *tls.Config {
return &tls.Config{
Rand: c.Rand,
Time: c.Time,
Certificates: c.Certificates,
NameToCertificate: c.NameToCertificate,
GetCertificate: c.GetCertificate,
RootCAs: c.RootCAs,
NextProtos: c.NextProtos,
ServerName: c.ServerName,
ClientAuth: c.ClientAuth,
ClientCAs: c.ClientCAs,
InsecureSkipVerify: c.InsecureSkipVerify,
CipherSuites: c.CipherSuites,
PreferServerCipherSuites: c.PreferServerCipherSuites,
SessionTicketsDisabled: c.SessionTicketsDisabled,
SessionTicketKey: c.SessionTicketKey,
ClientSessionCache: c.ClientSessionCache,
MinVersion: c.MinVersion,
MaxVersion: c.MaxVersion,
CurvePreferences: c.CurvePreferences,
}
}

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@@ -0,0 +1,33 @@
// +build go1.7,!go1.8
package tlsconfig
import "crypto/tls"
// Clone returns a clone of tls.Config. This function is provided for
// compatibility for go1.7 that doesn't include this method in stdlib.
func Clone(c *tls.Config) *tls.Config {
return &tls.Config{
Rand: c.Rand,
Time: c.Time,
Certificates: c.Certificates,
NameToCertificate: c.NameToCertificate,
GetCertificate: c.GetCertificate,
RootCAs: c.RootCAs,
NextProtos: c.NextProtos,
ServerName: c.ServerName,
ClientAuth: c.ClientAuth,
ClientCAs: c.ClientCAs,
InsecureSkipVerify: c.InsecureSkipVerify,
CipherSuites: c.CipherSuites,
PreferServerCipherSuites: c.PreferServerCipherSuites,
SessionTicketsDisabled: c.SessionTicketsDisabled,
SessionTicketKey: c.SessionTicketKey,
ClientSessionCache: c.ClientSessionCache,
MinVersion: c.MinVersion,
MaxVersion: c.MaxVersion,
CurvePreferences: c.CurvePreferences,
DynamicRecordSizingDisabled: c.DynamicRecordSizingDisabled,
Renegotiation: c.Renegotiation,
}
}