From f62a356515e387b0bbcf1f08b4831d139c2039b7 Mon Sep 17 00:00:00 2001
From: Daniel J Walsh <dwalsh@redhat.com>
Date: Wed, 18 Nov 2020 16:12:33 -0500
Subject: Remove varlink support from Podman

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
---
 pkg/varlinkapi/attach.go | 144 -----------------------------------------------
 1 file changed, 144 deletions(-)
 delete mode 100644 pkg/varlinkapi/attach.go

(limited to 'pkg/varlinkapi/attach.go')

diff --git a/pkg/varlinkapi/attach.go b/pkg/varlinkapi/attach.go
deleted file mode 100644
index 38354a790..000000000
--- a/pkg/varlinkapi/attach.go
+++ /dev/null
@@ -1,144 +0,0 @@
-// +build varlink
-
-package varlinkapi
-
-import (
-	"bufio"
-	"context"
-	"io"
-
-	"github.com/containers/podman/v2/libpod"
-	"github.com/containers/podman/v2/libpod/define"
-	"github.com/containers/podman/v2/libpod/events"
-	iopodman "github.com/containers/podman/v2/pkg/varlink"
-	"github.com/containers/podman/v2/pkg/varlinkapi/virtwriter"
-	"github.com/pkg/errors"
-	"github.com/sirupsen/logrus"
-	"k8s.io/client-go/tools/remotecommand"
-)
-
-func setupStreams(call iopodman.VarlinkCall) (*bufio.Reader, *bufio.Writer, *io.PipeReader, *io.PipeWriter, *define.AttachStreams) {
-
-	// These are the varlink sockets
-	reader := call.Call.Reader
-	writer := call.Call.Writer
-
-	// This pipe is used to pass stdin from the client to the input stream
-	// once the msg has been "decoded"
-	pr, pw := io.Pipe()
-
-	stdoutWriter := virtwriter.NewVirtWriteCloser(writer, virtwriter.ToStdout)
-	// TODO if runc ever starts passing stderr, we can too
-	// stderrWriter := NewVirtWriteCloser(writer, ToStderr)
-
-	streams := define.AttachStreams{
-		OutputStream: stdoutWriter,
-		InputStream:  bufio.NewReader(pr),
-		// Runc eats the error stream
-		ErrorStream:  stdoutWriter,
-		AttachInput:  true,
-		AttachOutput: true,
-		// Runc eats the error stream
-		AttachError: true,
-	}
-	return reader, writer, pr, pw, &streams
-}
-
-// Attach connects to a containers console
-func (i *VarlinkAPI) Attach(call iopodman.VarlinkCall, name string, detachKeys string, start bool) error {
-	var finalErr error
-	resize := make(chan remotecommand.TerminalSize)
-	errChan := make(chan error)
-
-	if !call.WantsUpgrade() {
-		return call.ReplyErrorOccurred("client must use upgraded connection to attach")
-	}
-	ctr, err := i.Runtime.LookupContainer(name)
-	if err != nil {
-		return call.ReplyErrorOccurred(err.Error())
-	}
-	state, err := ctr.State()
-	if err != nil {
-		return call.ReplyErrorOccurred(err.Error())
-	}
-	if !start && state != define.ContainerStateRunning {
-		return call.ReplyErrorOccurred("container must be running to attach")
-	}
-
-	// ACK the client upgrade request
-	if err := call.ReplyAttach(); err != nil {
-		return call.ReplyErrorOccurred(err.Error())
-	}
-
-	reader, writer, _, pw, streams := setupStreams(call)
-	go func() {
-		if err := virtwriter.Reader(reader, nil, nil, pw, resize, nil); err != nil {
-			errChan <- err
-		}
-	}()
-
-	if state == define.ContainerStateRunning {
-		finalErr = attach(ctr, streams, detachKeys, resize, errChan)
-	} else {
-		finalErr = startAndAttach(ctr, streams, detachKeys, resize, errChan)
-	}
-
-	exitCode := define.ExitCode(finalErr)
-	if finalErr != define.ErrDetach && finalErr != nil {
-		logrus.Error(finalErr)
-	} else {
-		if ecode, err := ctr.Wait(); err != nil {
-			if errors.Cause(err) == define.ErrNoSuchCtr {
-				// Check events
-				event, err := i.Runtime.GetLastContainerEvent(context.Background(), ctr.ID(), events.Exited)
-				if err != nil {
-					logrus.Errorf("Cannot get exit code: %v", err)
-					exitCode = define.ExecErrorCodeNotFound
-				} else {
-					exitCode = event.ContainerExitCode
-				}
-			} else {
-				exitCode = define.ExitCode(err)
-			}
-		} else {
-			exitCode = int(ecode)
-		}
-	}
-
-	if ctr.AutoRemove() {
-		err := i.Runtime.RemoveContainer(getContext(), ctr, false, false)
-		if err != nil {
-			logrus.Errorf("Failed to remove container %s: %s", ctr.ID(), err.Error())
-		}
-	}
-
-	if err = virtwriter.HangUp(writer, uint32(exitCode)); err != nil {
-		logrus.Errorf("Failed to HANG-UP attach to %s: %s", ctr.ID(), err.Error())
-	}
-	return call.Writer.Flush()
-}
-
-func attach(ctr *libpod.Container, streams *define.AttachStreams, detachKeys string, resize chan remotecommand.TerminalSize, errChan chan error) error {
-	go func() {
-		if err := ctr.Attach(streams, detachKeys, resize); err != nil {
-			errChan <- err
-		}
-	}()
-	attachError := <-errChan
-	return attachError
-}
-
-func startAndAttach(ctr *libpod.Container, streams *define.AttachStreams, detachKeys string, resize chan remotecommand.TerminalSize, errChan chan error) error {
-	var finalErr error
-	attachChan, err := ctr.StartAndAttach(getContext(), streams, detachKeys, resize, false)
-	if err != nil {
-		return err
-	}
-	select {
-	case attachChanErr := <-attachChan:
-		finalErr = attachChanErr
-	case chanError := <-errChan:
-		finalErr = chanError
-	}
-	return finalErr
-}
-- 
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