shim

type Environment struct {
	User         string            // user the command will run as (may be empty / synthetic)
	OutPipe      string            // io pipe path for stdout
	ErrPipe      string            // io pipe path for stderr
	Env          map[string]string // environment variables
	TaskDir      string            // task directory
	Cgroup       string            // task cgroup path
	Net          string            // allocation network namespace path
	Memory       uint64            // memory in megabytes
	MemoryMax    uint64            // memory_max in megabytes
	CPUBandwidth uint64            // cpu / cores bandwidth
}

type ExecTwo interface {
	// Start the Task process.
	Start(context.Context) error

	// PID returns the process ID associated with exec.
	//
	// Must only be called after Start.
	PID() int

	// Wait on the process (until exit).
	//
	// Must only be called after Start.
	WaitCh() process.WaitCh

	// Stats returns current resource utilization.
	//
	// Must only be called after Start.
	Stats() *resources.Utilization

	// Signal [kill()] the process.
	//
	// Must be called after Start.
	Signal(string) error

	// Stop the process.
	//
	// Must be called after Start.
	Stop(string, time.Duration) error
}

type Options struct {
	Command        string
	Arguments      []string
	UnveilPaths    []string
	UnveilDefaults bool
}