ns

type NetNS interface {
	// Do execute the passed closure in this object's network namespace,
	// attempting to restore the original namespace before returning.
	// However, since each OS thread can have a different network namespace,
	// and Go's thread scheduling is highly variable, callers cannot
	// guarantee any specific namespace is set unless operations that
	// require that namespace are wrapped with Do().  Also, no code called
	// from Do() should call runtime.UnlockOSThread(), or the risk
	// of executing code in an incorrect namespace will be greater.  See
	// https://github.com/golang/go/wiki/LockOSThread for further details.
	Do(toRun func(NetNS) error) error

	// Set the current network namespace to this object's network namespace.
	// Note that since Go's thread scheduling is highly variable, callers
	// cannot guarantee the requested namespace will be the current namespace
	// after this function is called; to ensure this wrap operations that
	// require the namespace with Do() instead.
	Set() error

	// Path returns the filesystem path representing this object's network namespace
	Path() string

	// Fd returns a file descriptor representing this object's network namespace
	Fd() uintptr

	// Close cleans up this instance of the network namespace; if this instance
	// is the last user the namespace will be destroyed
	Close() error
}