package browser import ( "errors" "os/exec" ) var errNoXdgOpen = errors.New("xdg-open: command not found - install xdg-utils from ports(8)") func openBrowser(url string) error { err := runCmd("xdg-open", url) if e, ok := err.(*exec.Error); ok && e.Err == exec.ErrNotFound { return errNoXdgOpen } return err }