Function EnsureHelperToolPresent

sysproxy.go:30–41

EnsureHelperToolPresent checks if helper tool exists and extracts it if not. On Mac OS, it also checks and set the file's owner to root:wheel and the setuid bit, it will request user to input password through a dialog to gain the rights to do so. path: absolute or relative path of the file to be che

(path string, prompt string, iconFullPath string)

// prompt: the message to be shown on the dialog.
// iconPath: the full path of the icon to be shown on the dialog.
func EnsureHelperToolPresent(path string, prompt string, iconFullPath string) (err error) {
	mu.Lock()
	defer mu.Unlock()
	if len(sysproxy) == 0 {
		return fmt.Errorf("unable to find binary: %v", sysproxy)
	}
	be, err = byteexec.New(sysproxy, path)
	if err != nil {
		return fmt.Errorf("unable to extract helper tool: %v", err)
	}
	return ensureElevatedOnDarwin(be, prompt, iconFullPath)
}

// On tells OS to configure proxy through `addr` as host:port. It always returns
// a function that can be used to clear the system proxy setting. If the current