115 lines
3.1 KiB
Go
115 lines
3.1 KiB
Go
//go:build !windows
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/*
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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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gocontext "context"
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"errors"
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"net/url"
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"os"
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"os/signal"
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"github.com/containerd/console"
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"github.com/containerd/containerd"
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"github.com/containerd/containerd/cio"
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"github.com/containerd/containerd/log"
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"github.com/urfave/cli"
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"golang.org/x/sys/unix"
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)
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var platformStartFlags = []cli.Flag{
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cli.BoolFlag{
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Name: "no-pivot",
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Usage: "disable use of pivot-root (linux only)",
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},
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}
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// HandleConsoleResize resizes the console
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func HandleConsoleResize(ctx gocontext.Context, task resizer, con console.Console) error {
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// do an initial resize of the console
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size, err := con.Size()
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if err != nil {
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return err
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}
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if err := task.Resize(ctx, uint32(size.Width), uint32(size.Height)); err != nil {
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log.G(ctx).WithError(err).Error("resize pty")
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}
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s := make(chan os.Signal, 16)
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signal.Notify(s, unix.SIGWINCH)
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go func() {
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for range s {
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size, err := con.Size()
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if err != nil {
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log.G(ctx).WithError(err).Error("get pty size")
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continue
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}
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if err := task.Resize(ctx, uint32(size.Width), uint32(size.Height)); err != nil {
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log.G(ctx).WithError(err).Error("resize pty")
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}
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}
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}()
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return nil
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}
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// NewTask creates a new task
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func NewTask(ctx gocontext.Context, client *containerd.Client, container containerd.Container, checkpoint string, con console.Console, nullIO bool, logURI string, ioOpts []cio.Opt, opts ...containerd.NewTaskOpts) (containerd.Task, error) {
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stdinC := &stdinCloser{
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stdin: os.Stdin,
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}
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if checkpoint != "" {
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im, err := client.GetImage(ctx, checkpoint)
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if err != nil {
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return nil, err
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}
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opts = append(opts, containerd.WithTaskCheckpoint(im))
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}
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var ioCreator cio.Creator
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if con != nil {
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if nullIO {
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return nil, errors.New("tty and null-io cannot be used together")
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}
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ioCreator = cio.NewCreator(append([]cio.Opt{cio.WithStreams(con, con, nil), cio.WithTerminal}, ioOpts...)...)
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} else if nullIO {
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ioCreator = cio.NullIO
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} else if logURI != "" {
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u, err := url.Parse(logURI)
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if err != nil {
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return nil, err
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}
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ioCreator = cio.LogURI(u)
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} else {
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ioCreator = cio.NewCreator(append([]cio.Opt{cio.WithStreams(stdinC, os.Stdout, os.Stderr)}, ioOpts...)...)
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}
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t, err := container.NewTask(ctx, ioCreator, opts...)
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if err != nil {
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return nil, err
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}
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stdinC.closer = func() {
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t.CloseIO(ctx, containerd.WithStdinCloser)
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}
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return t, nil
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}
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func getNewTaskOpts(context *cli.Context) []containerd.NewTaskOpts {
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if context.Bool("no-pivot") {
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return []containerd.NewTaskOpts{containerd.WithNoPivotRoot}
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}
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return nil
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}
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