isJailbroken.swift

func isJailbroken() -> Bool {
    #if !targetEnvironment(simulator)
    if FileManager.default.fileExists(atPath: "/Applications/Cydia.app") ||
        FileManager.default.fileExists(atPath: "/Library/MobileSubstrate/MobileSubstrate.dylib") ||
        FileManager.default.fileExists(atPath: "/bin/bash") ||
        FileManager.default.fileExists(atPath: "/usr/sbin/sshd") ||
        FileManager.default.fileExists(atPath: "/etc/apt") ||
        FileManager.default.fileExists(atPath: "/private/var/lib/apt/") {
        return true
    }

    let stringToWrite = "howdy"
    do {
        try stringToWrite.write(toFile: "/private/JailbreakTest.txt", atomically: true, encoding: String.Encoding.utf8)
        return true
    } catch {
        return false
    }
    #else
    return false
    #endif
}