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tasks_unix.go
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tasks_unix.go
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// +build !windows
package tasks
import (
gocontext "context"
"os"
"os/signal"
"github.com/containerd/console"
"github.com/containerd/containerd"
"github.com/containerd/containerd/cio"
"github.com/containerd/containerd/log"
"github.com/pkg/errors"
"golang.org/x/sys/unix"
)
// HandleConsoleResize resizes the console
func HandleConsoleResize(ctx gocontext.Context, task resizer, con console.Console) error {
// do an initial resize of the console
size, err := con.Size()
if err != nil {
return err
}
if err := task.Resize(ctx, uint32(size.Width), uint32(size.Height)); err != nil {
log.G(ctx).WithError(err).Error("resize pty")
}
s := make(chan os.Signal, 16)
signal.Notify(s, unix.SIGWINCH)
go func() {
for range s {
size, err := con.Size()
if err != nil {
log.G(ctx).WithError(err).Error("get pty size")
continue
}
if err := task.Resize(ctx, uint32(size.Width), uint32(size.Height)); err != nil {
log.G(ctx).WithError(err).Error("resize pty")
}
}
}()
return nil
}
// NewTask creates a new task
func NewTask(ctx gocontext.Context, client *containerd.Client, container containerd.Container, checkpoint string, tty, nullIO bool) (containerd.Task, error) {
if checkpoint == "" {
ioCreator := cio.Stdio
if tty {
ioCreator = cio.StdioTerminal
}
if nullIO {
if tty {
return nil, errors.New("tty and null-io cannot be used together")
}
ioCreator = cio.NullIO
}
return container.NewTask(ctx, ioCreator)
}
im, err := client.GetImage(ctx, checkpoint)
if err != nil {
return nil, err
}
return container.NewTask(ctx, cio.Stdio, containerd.WithTaskCheckpoint(im))
}