mirror of https://github.com/docker/cli.git
104 lines
2.2 KiB
Go
104 lines
2.2 KiB
Go
package container
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import (
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"context"
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"fmt"
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"os"
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gosignal "os/signal"
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"runtime"
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"time"
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"github.com/docker/cli/cli/command"
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"github.com/docker/docker/api/types"
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"github.com/docker/docker/client"
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"github.com/docker/docker/pkg/signal"
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"github.com/sirupsen/logrus"
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)
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// resizeTtyTo resizes tty to specific height and width
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func resizeTtyTo(ctx context.Context, client client.ContainerAPIClient, id string, height, width uint, isExec bool) {
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if height == 0 && width == 0 {
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return
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}
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options := types.ResizeOptions{
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Height: height,
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Width: width,
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}
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var err error
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if isExec {
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err = client.ContainerExecResize(ctx, id, options)
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} else {
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err = client.ContainerResize(ctx, id, options)
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}
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if err != nil {
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logrus.Debugf("Error resize: %s", err)
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}
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}
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// MonitorTtySize updates the container tty size when the terminal tty changes size
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func MonitorTtySize(ctx context.Context, cli command.Cli, id string, isExec bool) error {
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resizeTty := func() {
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height, width := cli.Out().GetTtySize()
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resizeTtyTo(ctx, cli.Client(), id, height, width, isExec)
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}
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resizeTty()
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if runtime.GOOS == "windows" {
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go func() {
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prevH, prevW := cli.Out().GetTtySize()
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for {
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time.Sleep(time.Millisecond * 250)
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h, w := cli.Out().GetTtySize()
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if prevW != w || prevH != h {
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resizeTty()
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}
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prevH = h
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prevW = w
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}
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}()
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} else {
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sigchan := make(chan os.Signal, 1)
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gosignal.Notify(sigchan, signal.SIGWINCH)
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go func() {
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for range sigchan {
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resizeTty()
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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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// ForwardAllSignals forwards signals to the container
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func ForwardAllSignals(ctx context.Context, cli command.Cli, cid string) chan os.Signal {
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sigc := make(chan os.Signal, 128)
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signal.CatchAll(sigc)
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go func() {
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for s := range sigc {
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if s == signal.SIGCHLD || s == signal.SIGPIPE {
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continue
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}
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var sig string
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for sigStr, sigN := range signal.SignalMap {
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if sigN == s {
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sig = sigStr
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break
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}
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}
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if sig == "" {
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fmt.Fprintf(cli.Err(), "Unsupported signal: %v. Discarding.\n", s)
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continue
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}
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if err := cli.Client().ContainerKill(ctx, cid, sig); err != nil {
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logrus.Debugf("Error sending signal: %s", err)
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}
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}
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}()
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return sigc
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}
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