将包含变音符号的密码作为 Swift 中的参数传递给 Process 时出现问题

Question

所以我尝试使用来自 Swift 的 sudo 执行命令，使用以下代码（建议 here:

func doTask(_ password:String) {
    let taskOne = Process()
    taskOne.launchPath = "/bin/echo"
    taskOne.arguments = [password]

    let taskTwo = Process()
    taskTwo.launchPath = "/usr/bin/sudo"
    taskTwo.arguments = ["-S", "/usr/bin/xattr", "-d", "-r", "com.test.exemple", " /Desktop/file.extension"]
    //taskTwo.arguments = ["-S", "/usr/bin/touch", "/tmp/foo.bar.baz"]

    let pipeBetween:Pipe = Pipe()
    taskOne.standardOutput = pipeBetween
    taskTwo.standardInput = pipeBetween

    let pipeToMe = Pipe()
    taskTwo.standardOutput = pipeToMe
    taskTwo.standardError = pipeToMe

    taskOne.launch()
    taskTwo.launch()

    let data = pipeToMe.fileHandleForReading.readDataToEndOfFile()
    let output : String = NSString(data: data, encoding: String.Encoding.utf8.rawValue) as! String
    print(output)
}

它适用于“test”、“password#123”等密码。但是当我尝试使用包含元音符号（例如“ä”、“ü”或“ö”）的密码时，它却无法正常工作工作。有什么想法吗？

Answer 1

我不确定为什么另一个问题的答案通过 echo... 似乎引入了不必要的并发症和未知数。

以下更直接的方法已经过测试并且有效：

import Foundation

let password = "äëïöü"
let passwordWithNewline = password + "\n"
let sudo = Process()
sudo.launchPath = "/usr/bin/sudo"
sudo.arguments = ["-S", "/bin/ls"]
let sudoIn = Pipe()
let sudoOut = Pipe()
sudo.standardOutput = sudoOut
sudo.standardError = sudoOut
sudo.standardInput = sudoIn
sudo.launch()

// Show the output as it is produced
sudoOut.fileHandleForReading.readabilityHandler = { fileHandle in
    let data = fileHandle.availableData
    if (data.count == 0) { return }
    print("read \(data.count)")
    print("\(String(bytes: data, encoding: .utf8) ?? "<UTF8 conversion failed>")")

}
// Write the password
sudoIn.fileHandleForWriting.write(passwordWithNewline.data(using: .utf8)!)

// Close the file handle after writing the password; avoids a
// hang for incorrect password.
try? sudoIn.fileHandleForWriting.close()

// Make sure we don't disappear while output is still being produced.
sudo.waitUntilExit()
print("Process did exit")

关键是密码后必须加换行。（我想在某些方面 echo 只是一种过于复杂的方法！）

将包含变音符号的密码作为 Swift 中的参数传递给 Process 时出现问题

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