Kotlin-native执行命令并获取输出

import kotlinx.cinterop.*
import platform.posix.*

fun executeCommand(command: String): String {
    val bufferLength = 4096
    val buffer = ByteArray(bufferLength)

    memScoped {
        val pipe = allocArray<IntVar>(2)
        pipe.usePinned { pipePtr ->
            // 创建管道
            if (pipe(pipePtr.addressOf(0)) == -1) {
                perror("pipe")
                return ""
            }

            // 创建子进程
            val pid = fork()
            if (pid == -1) {
                perror("fork")
                return ""
            }

            if (pid == 0) {
                // 子进程中执行命令并将输出写入管道
                close(pipe[0])
                dup2(pipe[1], STDOUT_FILENO)
                close(pipe[1])
                system(command)
                _exit(0)
            } else {
                // 父进程中读取管道中的输出
                close(pipe[1])
                val output = StringBuilder()

                while (true) {
                    val bytesRead = read(pipe[0], buffer.refTo(0), bufferLength.toULong())
                    if (bytesRead == -1) {
                        perror("read")
                        break
                    } else if (bytesRead.toUInt() == 0u) {
                        break
                    } else {
                        output.append(buffer.decodeToString(0, bytesRead.toInt()))
                    }
                }

                close(pipe[0])
                return output.toString()
            }
        }
    }
}

fun main() {
    val command = "ls -l"
    val output = executeCommand(command)
    println(output)
}