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package daemon
import ( |
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"fmt" |
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"io" |
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"time" |
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|
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"github.com/Sirupsen/logrus" |
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"github.com/docker/docker/api/types/backend" |
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"github.com/docker/docker/container" |
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"github.com/docker/docker/daemon/logger" |
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"github.com/docker/docker/errors" |
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"github.com/docker/docker/pkg/stdcopy" |
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"github.com/docker/docker/pkg/term" |
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)
|
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// ContainerAttach attaches to logs according to the config passed in. See ContainerAttachConfig.
func (daemon *Daemon) ContainerAttach(prefixOrName string, c *backend.ContainerAttachConfig) error { |
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keys := []byte{}
var err error
if c.DetachKeys != "" {
keys, err = term.ToBytes(c.DetachKeys)
if err != nil {
return fmt.Errorf("Invalid escape keys (%s) provided", c.DetachKeys)
}
}
|
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container, err := daemon.GetContainer(prefixOrName) |
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if err != nil { |
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return err |
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}
if container.IsPaused() { |
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err := fmt.Errorf("Container %s is paused. Unpause the container before attach", prefixOrName)
return errors.NewRequestConflictError(err) |
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}
|
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inStream, outStream, errStream, err := c.GetStreams() |
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if err != nil { |
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return err
} |
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defer inStream.Close() |
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|
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if !container.Config.Tty && c.MuxStreams {
errStream = stdcopy.NewStdWriter(errStream, stdcopy.Stderr) |
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outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout) |
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}
|
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var stdin io.ReadCloser
var stdout, stderr io.Writer |
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|
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if c.UseStdin { |
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stdin = inStream |
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}
if c.UseStdout { |
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stdout = outStream |
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}
if c.UseStderr {
stderr = errStream |
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}
|
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if err := daemon.containerAttach(container, stdin, stdout, stderr, c.Logs, c.Stream, keys); err != nil { |
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fmt.Fprintf(outStream, "Error attaching: %s\n", err)
}
return nil |
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} |
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|
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// ContainerAttachRaw attaches the provided streams to the container's stdio
func (daemon *Daemon) ContainerAttachRaw(prefixOrName string, stdin io.ReadCloser, stdout, stderr io.Writer, stream bool) error { |
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container, err := daemon.GetContainer(prefixOrName) |
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if err != nil {
return err
} |
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return daemon.containerAttach(container, stdin, stdout, stderr, false, stream, nil) |
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}
|
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func (daemon *Daemon) containerAttach(c *container.Container, stdin io.ReadCloser, stdout, stderr io.Writer, logs, stream bool, keys []byte) error { |
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if logs { |
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logDriver, err := daemon.getLogger(c) |
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if err != nil {
return err
}
cLog, ok := logDriver.(logger.LogReader)
if !ok {
return logger.ErrReadLogsNotSupported
}
logs := cLog.ReadLogs(logger.ReadConfig{Tail: -1})
LogLoop:
for {
select {
case msg, ok := <-logs.Msg:
if !ok {
break LogLoop
}
if msg.Source == "stdout" && stdout != nil {
stdout.Write(msg.Line)
}
if msg.Source == "stderr" && stderr != nil {
stderr.Write(msg.Line)
}
case err := <-logs.Err:
logrus.Errorf("Error streaming logs: %v", err)
break LogLoop
}
}
}
|
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daemon.LogContainerEvent(c, "attach") |
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//stream
if stream {
var stdinPipe io.ReadCloser
if stdin != nil {
r, w := io.Pipe()
go func() {
defer w.Close() |
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defer logrus.Debug("Closing buffered stdin pipe") |
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io.Copy(w, stdin)
}()
stdinPipe = r
} |
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waitChan := make(chan struct{})
if c.Config.StdinOnce && !c.Config.Tty {
go func() {
c.WaitStop(-1 * time.Second)
close(waitChan)
}()
}
|
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err := <-c.Attach(stdinPipe, stdout, stderr, keys)
if err != nil { |
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if _, ok := err.(container.DetachError); ok { |
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daemon.LogContainerEvent(c, "detach")
} else {
logrus.Errorf("attach failed with error: %v", err)
}
}
|
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// If we are in stdinonce mode, wait for the process to end
// otherwise, simply return |
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if c.Config.StdinOnce && !c.Config.Tty { |
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<-waitChan |
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}
}
return nil |
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} |