140 lines
3.2 KiB
Go
140 lines
3.2 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package tasks
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import (
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"errors"
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"github.com/containerd/console"
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"github.com/containerd/containerd/cio"
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"github.com/containerd/containerd/cmd/ctr/commands"
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"github.com/sirupsen/logrus"
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"github.com/urfave/cli"
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)
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//TODO:(jessvalarezo) exec-id is optional here, update to required arg
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var execCommand = cli.Command{
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Name: "exec",
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Usage: "execute additional processes in an existing container",
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ArgsUsage: "[flags] CONTAINER CMD [ARG...]",
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Flags: []cli.Flag{
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cli.StringFlag{
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Name: "cwd",
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Usage: "working directory of the new process",
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},
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cli.BoolFlag{
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Name: "tty,t",
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Usage: "allocate a TTY for the container",
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},
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cli.BoolFlag{
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Name: "detach,d",
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Usage: "detach from the task after it has started execution",
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},
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cli.StringFlag{
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Name: "exec-id",
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Usage: "exec specific id for the process",
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},
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cli.StringFlag{
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Name: "fifo-dir",
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Usage: "directory used for storing IO FIFOs",
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},
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},
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Action: func(context *cli.Context) error {
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var (
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id = context.Args().First()
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args = context.Args().Tail()
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tty = context.Bool("tty")
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detach = context.Bool("detach")
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)
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if id == "" {
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return errors.New("container id must be provided")
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}
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client, ctx, cancel, err := commands.NewClient(context)
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if err != nil {
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return err
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}
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defer cancel()
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container, err := client.LoadContainer(ctx, id)
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if err != nil {
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return err
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}
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spec, err := container.Spec(ctx)
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if err != nil {
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return err
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}
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task, err := container.Task(ctx, nil)
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if err != nil {
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return err
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}
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pspec := spec.Process
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pspec.Terminal = tty
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pspec.Args = args
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cioOpts := []cio.Opt{cio.WithStdio, cio.WithFIFODir(context.String("fifo-dir"))}
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if tty {
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cioOpts = append(cioOpts, cio.WithTerminal)
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}
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ioCreator := cio.NewCreator(cioOpts...)
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process, err := task.Exec(ctx, context.String("exec-id"), pspec, ioCreator)
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if err != nil {
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return err
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}
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defer process.Delete(ctx)
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statusC, err := process.Wait(ctx)
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if err != nil {
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return err
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}
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var con console.Console
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if tty {
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con = console.Current()
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defer con.Reset()
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if err := con.SetRaw(); err != nil {
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return err
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}
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}
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if !detach {
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if tty {
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if err := HandleConsoleResize(ctx, process, con); err != nil {
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logrus.WithError(err).Error("console resize")
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}
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} else {
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sigc := commands.ForwardAllSignals(ctx, process)
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defer commands.StopCatch(sigc)
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}
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}
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if err := process.Start(ctx); err != nil {
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return err
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}
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if detach {
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return nil
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}
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status := <-statusC
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code, _, err := status.Result()
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if err != nil {
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return err
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}
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if code != 0 {
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return cli.NewExitError("", int(code))
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}
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return nil
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},
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}
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