package main import ( "os" "github.com/pkg/errors" "github.com/projectatomic/libpod/cmd/podman/libpodruntime" "github.com/projectatomic/libpod/libpod" "github.com/urfave/cli" ) var ( attachFlags = []cli.Flag{ cli.StringFlag{ Name: "detach-keys", Usage: "Override the key sequence for detaching a container. Format is a single character [a-Z] or ctrl- where is one of: a-z, @, ^, [, , or _.", }, cli.BoolFlag{ Name: "no-stdin", Usage: "Do not attach STDIN. The default is false.", }, cli.BoolTFlag{ Name: "sig-proxy", Usage: "proxy received signals to the process (default true)", }, LatestFlag, } 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 = cli.Command{ Name: "attach", Usage: "Attach to a running container", Description: attachDescription, Flags: attachFlags, Action: attachCmd, ArgsUsage: "", } ) func attachCmd(c *cli.Context) error { args := c.Args() var ctr *libpod.Container if err := validateFlags(c, attachFlags); err != nil { return err } if len(c.Args()) > 1 || (len(c.Args()) == 0 && !c.Bool("latest")) { return errors.Errorf("attach requires the name or id of one running container or the latest flag") } runtime, err := libpodruntime.GetRuntime(c) if err != nil { return errors.Wrapf(err, "error creating libpod runtime") } defer runtime.Shutdown(false) if c.Bool("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.Bool("no-stdin") { inputStream = nil } if err := attachCtr(ctr, os.Stdout, os.Stderr, inputStream, c.String("detach-keys"), c.BoolT("sig-proxy")); err != nil { return errors.Wrapf(err, "error attaching to container %s", ctr.ID()) } return nil }