package main import ( "os" "github.com/containers/libpod/cmd/podman/cliconfig" "github.com/containers/libpod/cmd/podman/libpodruntime" "github.com/containers/libpod/libpod" "github.com/pkg/errors" "github.com/spf13/cobra" ) var ( attachCommand cliconfig.AttachValues attachDescription = "The podman attach command allows you to attach to a running container using the container's ID or name, either to view its ongoing output or to control it interactively." _attachCommand = &cobra.Command{ Use: "attach [flags] CONTAINER", Short: "Attach to a running container", Long: attachDescription, RunE: func(cmd *cobra.Command, args []string) error { attachCommand.InputArgs = args attachCommand.GlobalFlags = MainGlobalOpts return attachCmd(&attachCommand) }, Example: `podman attach ctrID podman attach 1234 podman attach --no-stdin foobar`, } ) func init() { attachCommand.Command = _attachCommand attachCommand.SetUsageTemplate(UsageTemplate()) flags := attachCommand.Flags() flags.StringVar(&attachCommand.DetachKeys, "detach-keys", "", "Override the key sequence for detaching a container. Format is a single character [a-Z] or ctrl- where is one of: a-z, @, ^, [, , or _") flags.BoolVar(&attachCommand.NoStdin, "no-stdin", false, "Do not attach STDIN. The default is false") flags.BoolVar(&attachCommand.SigProxy, "sig-proxy", true, "Proxy received signals to the process (default true)") flags.BoolVarP(&attachCommand.Latest, "latest", "l", false, "Act on the latest container podman is aware of") markFlagHiddenForRemoteClient("latest", flags) } func attachCmd(c *cliconfig.AttachValues) error { args := c.InputArgs var ctr *libpod.Container if len(c.InputArgs) > 1 || (len(c.InputArgs) == 0 && !c.Latest) { return errors.Errorf("attach requires the name or id of one running container or the latest flag") } runtime, err := libpodruntime.GetRuntime(&c.PodmanCommand) if err != nil { return errors.Wrapf(err, "error creating libpod runtime") } defer runtime.Shutdown(false) if c.Latest { ctr, err = runtime.GetLatestContainer() } else { ctr, err = runtime.LookupContainer(args[0]) } if err != nil { return errors.Wrapf(err, "unable to exec into %s", args[0]) } conState, err := ctr.State() if err != nil { return errors.Wrapf(err, "unable to determine state of %s", args[0]) } if conState != libpod.ContainerStateRunning { return errors.Errorf("you can only attach to running containers") } inputStream := os.Stdin if c.NoStdin { inputStream = nil } // If the container is in a pod, also set to recursively start dependencies if err := startAttachCtr(ctr, os.Stdout, os.Stderr, inputStream, c.DetachKeys, c.SigProxy, false, ctr.PodID() != ""); err != nil && errors.Cause(err) != libpod.ErrDetach { return errors.Wrapf(err, "error attaching to container %s", ctr.ID()) } return nil }