var executablePath string // set by sysauxv in ../runtime/os3_solaris.go

var initCwd, initCwdErr = Getwd()

func executable() (string, error) {
	path := executablePath
	if len(path) == 0 {
		path, err := syscall.Getexecname()
		if err != nil {
			return path, err
		}
	}
	if len(path) > 0 && path[0] != '/' {
		if initCwdErr != nil {
			return path, initCwdErr
		}
		if len(path) > 2 && path[0:2] == "./" {
			// skip "./"