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moby--moby/api/client/attach.go
Lei Jitang 2b0927c9ac Use consistent command description
Signed-off-by: Lei Jitang <leijitang@huawei.com>
2015-10-08 08:46:21 -04:00

84 lines
1.9 KiB
Go

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