487ea81316
In cases where an exec start failed the exec process will be nil even though the channel to signal that the exec started was closed. Ideally ExecConfig would get a nice refactor to handle this case better (ie. it's not started so don't close that channel). This is a minimal fix to prevent NPE. Luckilly this would only get called by a client and only the http request goroutine gets the panic (http lib recovers the panic). Signed-off-by: Brian Goff <cpuguy83@gmail.com>
61 lines
1.7 KiB
Go
61 lines
1.7 KiB
Go
package daemon // import "github.com/docker/docker/daemon"
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import (
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"context"
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"errors"
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"strconv"
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"time"
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"github.com/docker/docker/errdefs"
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)
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// ContainerResize changes the size of the TTY of the process running
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// in the container with the given name to the given height and width.
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func (daemon *Daemon) ContainerResize(name string, height, width int) error {
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container, err := daemon.GetContainer(name)
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if err != nil {
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return err
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}
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container.Lock()
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tsk, err := container.GetRunningTask()
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container.Unlock()
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if err != nil {
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return err
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}
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if err = tsk.Resize(context.Background(), uint32(width), uint32(height)); err == nil {
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attributes := map[string]string{
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"height": strconv.Itoa(height),
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"width": strconv.Itoa(width),
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}
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daemon.LogContainerEventWithAttributes(container, "resize", attributes)
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}
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return err
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}
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// ContainerExecResize changes the size of the TTY of the process
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// running in the exec with the given name to the given height and
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// width.
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func (daemon *Daemon) ContainerExecResize(name string, height, width int) error {
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ec, err := daemon.getExecConfig(name)
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if err != nil {
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return err
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}
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// TODO: the timeout is hardcoded here, it would be more flexible to make it
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// a parameter in resize request context, which would need API changes.
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timeout := time.NewTimer(10 * time.Second)
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defer timeout.Stop()
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select {
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case <-ec.Started:
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// An error may have occurred, so ec.Process may be nil.
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if ec.Process == nil {
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return errdefs.InvalidParameter(errors.New("exec process is not started"))
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}
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return ec.Process.Resize(context.Background(), uint32(width), uint32(height))
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case <-timeout.C:
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return errors.New("timeout waiting for exec session ready")
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}
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}
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