mirror of
https://github.com/podman-container-tools/podman.git
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55f2f58145
This solves our prior problems with attach races by ensuring the order is correct. Also contains substantial cleanups to the attach code. Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #482 Approved by: baude
71 lines
1.9 KiB
Go
71 lines
1.9 KiB
Go
package main
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import (
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"github.com/pkg/errors"
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"github.com/projectatomic/libpod/libpod"
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"github.com/urfave/cli"
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)
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var (
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attachFlags = []cli.Flag{
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cli.StringFlag{
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Name: "detach-keys",
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Usage: "Override the key sequence for detaching a container. Format is a single character [a-Z] or ctrl-<value> where <value> is one of: a-z, @, ^, [, , or _.",
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},
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cli.BoolFlag{
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Name: "no-stdin",
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Usage: "Do not attach STDIN. The default is false.",
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},
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LatestFlag,
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}
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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."
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attachCommand = cli.Command{
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Name: "attach",
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Usage: "Attach to a running container",
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Description: attachDescription,
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Flags: attachFlags,
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Action: attachCmd,
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ArgsUsage: "",
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}
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)
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func attachCmd(c *cli.Context) error {
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args := c.Args()
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var ctr *libpod.Container
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if err := validateFlags(c, attachFlags); err != nil {
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return err
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}
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if len(c.Args()) > 1 || (len(c.Args()) == 0 && !c.Bool("latest")) {
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return errors.Errorf("attach requires the name or id of one running container or the latest flag")
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}
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runtime, err := getRuntime(c)
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if err != nil {
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return errors.Wrapf(err, "error creating libpod runtime")
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}
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defer runtime.Shutdown(false)
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if c.Bool("latest") {
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ctr, err = runtime.GetLatestContainer()
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} else {
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ctr, err = runtime.LookupContainer(args[0])
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}
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if err != nil {
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return errors.Wrapf(err, "unable to exec into %s", args[0])
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}
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conState, err := ctr.State()
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if err != nil {
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return errors.Wrapf(err, "unable to determine state of %s", args[0])
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}
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if conState != libpod.ContainerStateRunning {
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return errors.Errorf("you can only attach to running containers")
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}
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if err := ctr.Attach(c.Bool("no-stdin"), c.String("detach-keys")); err != nil {
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return errors.Wrapf(err, "error attaching to container %s", ctr.ID())
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}
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return nil
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}
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