Add Exec IDs

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

linux/process.go

@@ -0,0 +1,86 @@
+// +build linux
+
+package linux
+
+import (
+	"context"
+	"errors"
+
+	"github.com/containerd/containerd/api/types/task"
+	shim "github.com/containerd/containerd/linux/shim/v1"
+	"github.com/containerd/containerd/runtime"
+	"google.golang.org/grpc"
+)
+
+type Process struct {
+	id string
+	t  *Task
+}
+
+func (p *Process) ID() string {
+	return p.id
+}
+
+func (p *Process) Kill(ctx context.Context, signal uint32, _ bool) error {
+	_, err := p.t.shim.Kill(ctx, &shim.KillRequest{
+		Signal: signal,
+		ID:     p.id,
+	})
+	if err != nil {
+		err = errors.New(grpc.ErrorDesc(err))
+	}
+	return err
+}
+
+func (p *Process) State(ctx context.Context) (runtime.State, error) {
+	// use the container status for the status of the process
+	response, err := p.t.shim.State(ctx, &shim.StateRequest{
+		ID: p.id,
+	})
+	if err != nil {
+		return runtime.State{}, errors.New(grpc.ErrorDesc(err))
+	}
+	var status runtime.Status
+	switch response.Status {
+	case task.StatusCreated:
+		status = runtime.CreatedStatus
+	case task.StatusRunning:
+		status = runtime.RunningStatus
+	case task.StatusStopped:
+		status = runtime.StoppedStatus
+	case task.StatusPaused:
+		status = runtime.PausedStatus
+		// TODO: containerd.DeletedStatus
+	}
+	return runtime.State{
+		Pid:      response.Pid,
+		Status:   status,
+		Stdin:    response.Stdin,
+		Stdout:   response.Stdout,
+		Stderr:   response.Stderr,
+		Terminal: response.Terminal,
+	}, nil
+}
+
+func (p *Process) ResizePty(ctx context.Context, size runtime.ConsoleSize) error {
+	_, err := p.t.shim.ResizePty(ctx, &shim.ResizePtyRequest{
+		ID:     p.id,
+		Width:  size.Width,
+		Height: size.Height,
+	})
+	if err != nil {
+		err = errors.New(grpc.ErrorDesc(err))
+	}
+	return err
+}
+
+func (p *Process) CloseIO(ctx context.Context) error {
+	_, err := p.t.shim.CloseIO(ctx, &shim.CloseIORequest{
+		ID:    p.id,
+		Stdin: true,
+	})
+	if err != nil {
+		err = errors.New(grpc.ErrorDesc(err))
+	}
+	return err
+}