Method getExecConfig

daemon/exec.go:45–70

getExecConfig looks up the exec instance by name. If the container associated with the exec instance is stopped or paused, it will return an error.

(name string)

// getExecConfig looks up the exec instance by name. If the container associated
// with the exec instance is stopped or paused, it will return an error.
func (daemon *Daemon) getExecConfig(name string) (*container.ExecConfig, error) {
	ec := daemon.execCommands.Get(name)
	if ec == nil {
		return nil, errExecNotFound(name)
	}

	// If the exec is found but its container is not in the daemon's list of
	// containers then it must have been deleted, in which case instead of
	// saying the container isn't running, we should return a 404 so that
	// the user sees the same error now that they will after the
	// 5 minute clean-up loop is run which erases old/dead execs.
	ctr := daemon.containers.Get(ec.Container.ID)
	if ctr == nil {
		return nil, containerNotFound(name)
	}
	if !ctr.State.IsRunning() {
		return nil, errNotRunning(ctr.ID)
	}
	if ctr.State.IsPaused() {
		return nil, errExecPaused(ctr.ID)
	}
	if ctr.State.IsRestarting() {
		return nil, errContainerIsRestarting(ctr.ID)
	}
	return ec, nil
}

func (daemon *Daemon) unregisterExecCommand(container *container.Container, execConfig *container.ExecConfig) {
	container.ExecCommands.Delete(execConfig.ID)