Swift 判断是否是调试模式以及是否越狱

以下两段代码是从安全公司里面代码

判断是否是调试模式

extension UIApplication {

    var isBeingDebugged: Bool {
        // Initialize all the fields so that,
        // if sysctl fails for some bizarre reason, we get a predictable result.
        var info = kinfo_proc()
        // Initialize mib, which tells sysctl the info we want,
        // in this case we're looking for info about a specific process ID.
        var mib = [CTL_KERN, KERN_PROC, KERN_PROC_PID, getpid()]
        // Call sysctl.
        var size = MemoryLayout.stride(ofValue: info)
        let junk = sysctl(&mib, u_int(mib.count), &info, &size, nil, 0)
        assert(junk == 0, "sysctl failed")
        // We're being debugged if the P_TRACED flag is set.
        return (info.kp_proc.p_flag & P_TRACED) != 0
    }

}

判断是否越狱

import Foundation

var isJailbroken: Bool {
    return jailbreakFileExists
        || sandboxBreached
        || evidenceOfSymbolLinking
}

private var evidenceOfSymbolLinking: Bool {
    var s = stat()
    guard lstat("/Applications", &s) == 0 else { return false }
    return (s.st_mode & S_IFLNK == S_IFLNK)
}

private var sandboxBreached: Bool {
    guard (try? " ".write(
        toFile: "/private/jailbreak.txt",
        atomically: true, encoding: .utf8)) == nil else {
            return true
    }
    return false
}

private var jailbreakFileExists: Bool {
    let jailbreakFilePaths = [
        "/Applications/Cydia.app",
        "/Library/MobileSubstrate/MobileSubstrate.dylib",
        "/bin/bash",
        "/usr/sbin/sshd",
        "/etc/apt",
        "/private/var/lib/apt/"
    ]
    let fileManager = FileManager.default
    return jailbreakFilePaths.contains { path in
        if fileManager.fileExists(atPath: path) {
            return true
        }
        if let file = fopen(path, "r") {
            fclose(file)
            return true
        }
        return false
    }
}