ios 탈옥폰 체크(swift)

참조: https://6developer.com/935

object-c: https://indra17.tistory.com/entry/ios-%ED%83%88%EC%98%A5%ED%8F%B0-%EC%B2%B4%ED%81%AC?category=533814

func hasJailbreak() -> Bool {
        guard let cydiaUrlScheme = NSURL(string: "cydia://package/com.example.package") else { return false }
        if UIApplication.shared.canOpenURL(cydiaUrlScheme as URL) {
            return true
        }
        #if arch(i386) || arch(x86_64)
        return false
        #endif
        
        let fileManager = FileManager.default
        if fileManager.fileExists(atPath: "/Applications/Cydia.app") ||
            fileManager.fileExists(atPath: "/Library/MobileSubstrate/MobileSubstrate.dylib") ||
            fileManager.fileExists(atPath: "/bin/bash") ||
            fileManager.fileExists(atPath: "/usr/sbin/sshd") ||
            fileManager.fileExists(atPath: "/etc/apt") ||
            fileManager.fileExists(atPath: "/usr/bin/ssh") ||
            fileManager.fileExists(atPath: "/private/var/lib/apt") {
            return true
        }
        if canOpen(path: "/Applications/Cydia.app") ||
            canOpen(path: "/Library/MobileSubstrate/MobileSubstrate.dylib") ||
            canOpen(path: "/bin/bash") ||
            canOpen(path: "/usr/sbin/sshd") ||
            canOpen(path: "/etc/apt") ||
            canOpen(path: "/usr/bin/ssh") {
            return true
        }
        let path = "/private/" + NSUUID().uuidString
        do {
            try "anyString".write(toFile: path, atomically: true, encoding: String.Encoding.utf8)
            try fileManager.removeItem(atPath: path)
            return true
        } catch {
            return false
        }
    }
    func canOpen(path: String) -> Bool {
        let file = fopen(path, "r")
        guard file != nil else { return false }
        fclose(file)
        return true
    }