是否有 Unix 函数的 Java 库? [英] Is there a Java library of Unix functions?

问题描述

我正在寻找一个与标准 Unix 函数接口的 Java 库，即 stat()、getpwuid()、readlink().

I am looking for a Java library to interface with standard Unix functions, i.e. stat(), getpwuid(), readlink().

这曾经存在，被称为javaunix.它于 2000 年发布.请参阅此公告.但是项目页面现在不见了.

This used to exist, and was called javaunix. It was released back in 2000. See this announcement. But the project page is now gone.

今天在 Java 中是否有这些类型的函数的现代替代品?可以对 /bin/ls -l 进行系统调用并解析输出，或编写自定义 JNI 方法，但这些方法比简单地使用旧的 javaunix 更有效> 图书馆.

Is there any modern replacement for these types of functions in Java today? One could make a system call to /bin/ls -l and parse the output, or write a custom JNI method, but these approaches are more work than simply using the old javaunix library.

澄清 -- 为了从 C 程序中找出文件的所有者，它应该调用 stat() ，它给出所有者的 UID，然后使用 getpwuid() 从 UID 中获取帐户名称.在 Java 中，这可以通过自定义 JNI 方法或使用 JNI 的 javaunix 库来完成.

Clarification -- In order to find out a file's owner, from a C program, it should call stat() which gives the UID of the owner, and then use getpwuid() to get the account's name from the UID. In Java this can be done through a custom JNI method, or the javaunix library which uses JNI.

推荐答案

我知道两个引人注目的项目:

I'm aware of two compelling projects:

• posix for Java(基于 JNI)[源自 Jython]
• jna-posix(基于 JNA)[源自 JRuby]

• posix for Java (based on JNI) [derived from Jython]
• jna-posix (based on JNA) [derived from JRuby]

我个人非常喜欢 JNA.看看我的这个例子，映射link(2):

Personally I like very much JNA. Take a look at this example of mine, mapping link(2):

import com.sun.jna.Library;
import com.sun.jna.Native;

class Link {

    private static final C c =
        (C) Native.loadLibrary("c", C.class);

    private static interface C extends Library {

        /** see man 2 link */
        public int link(String oldpath, String newpath);
    }

    @Override
    protected void hardLink(String from, String to) {
        c.link(to, from);
    }
}

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