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attach.go
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/
attach.go
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package tasks
import (
"os"
"github.com/containerd/console"
"github.com/containerd/containerd/cio"
"github.com/containerd/containerd/cmd/ctr/commands"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
)
var attachCommand = cli.Command{
Name: "attach",
Usage: "attach to the IO of a running container",
ArgsUsage: "CONTAINER",
Action: func(context *cli.Context) error {
client, ctx, cancel, err := commands.NewClient(context)
if err != nil {
return err
}
defer cancel()
container, err := client.LoadContainer(ctx, context.Args().First())
if err != nil {
return err
}
spec, err := container.Spec(ctx)
if err != nil {
return err
}
var (
con console.Console
tty = spec.Process.Terminal
)
if tty {
con = console.Current()
defer con.Reset()
if err := con.SetRaw(); err != nil {
return err
}
}
task, err := container.Task(ctx, cio.WithAttach(os.Stdin, os.Stdout, os.Stderr))
if err != nil {
return err
}
defer task.Delete(ctx)
statusC, err := task.Wait(ctx)
if err != nil {
return err
}
if tty {
if err := HandleConsoleResize(ctx, task, con); err != nil {
logrus.WithError(err).Error("console resize")
}
} else {
sigc := commands.ForwardAllSignals(ctx, task)
defer commands.StopCatch(sigc)
}
ec := <-statusC
code, _, err := ec.Result()
if err != nil {
return err
}
if code != 0 {
return cli.NewExitError("", int(code))
}
return nil
},
}