89 lines
2.0 KiB
Go
89 lines
2.0 KiB
Go
package client
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import (
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"fmt"
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"io"
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"net/url"
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log "github.com/Sirupsen/logrus"
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"github.com/docker/docker/engine"
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flag "github.com/docker/docker/pkg/mflag"
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"github.com/docker/docker/pkg/signal"
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"github.com/docker/docker/utils"
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)
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// CmdAttach attaches to a running container.
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//
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// Usage: docker attach [OPTIONS] CONTAINER
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func (cli *DockerCli) CmdAttach(args ...string) error {
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var (
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cmd = cli.Subcmd("attach", "CONTAINER", "Attach to a running container", true)
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noStdin = cmd.Bool([]string{"#nostdin", "-no-stdin"}, false, "Do not attach STDIN")
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proxy = cmd.Bool([]string{"#sig-proxy", "-sig-proxy"}, true, "Proxy all received signals to the process")
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)
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cmd.Require(flag.Exact, 1)
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utils.ParseFlags(cmd, args, true)
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name := cmd.Arg(0)
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stream, _, err := cli.call("GET", "/containers/"+name+"/json", nil, false)
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if err != nil {
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return err
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}
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env := engine.Env{}
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if err := env.Decode(stream); err != nil {
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return err
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}
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if !env.GetSubEnv("State").GetBool("Running") {
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return fmt.Errorf("You cannot attach to a stopped container, start it first")
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}
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var (
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config = env.GetSubEnv("Config")
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tty = config.GetBool("Tty")
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)
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if err := cli.CheckTtyInput(!*noStdin, tty); err != nil {
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return err
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}
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if tty && cli.isTerminalOut {
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if err := cli.monitorTtySize(cmd.Arg(0), false); err != nil {
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log.Debugf("Error monitoring TTY size: %s", err)
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}
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}
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var in io.ReadCloser
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v := url.Values{}
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v.Set("stream", "1")
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if !*noStdin && config.GetBool("OpenStdin") {
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v.Set("stdin", "1")
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in = cli.in
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}
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v.Set("stdout", "1")
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v.Set("stderr", "1")
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if *proxy && !tty {
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sigc := cli.forwardAllSignals(cmd.Arg(0))
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defer signal.StopCatch(sigc)
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}
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if err := cli.hijack("POST", "/containers/"+cmd.Arg(0)+"/attach?"+v.Encode(), tty, in, cli.out, cli.err, nil, nil); err != nil {
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return err
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}
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_, status, err := getExitCode(cli, cmd.Arg(0))
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if err != nil {
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return err
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}
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if status != 0 {
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return &utils.StatusError{StatusCode: status}
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}
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return nil
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}
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