用 Java 为 OSX 编写一个可执行的 .sh 文件
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Write an executable .sh file with Java for OSX
提问by Glenn
So I am trying to write an .sh file that will be executable, this is how I'm currently writing it:
所以我正在尝试编写一个可执行的 .sh 文件，这就是我目前的编写方式：
Writer output = null;
try {
output = new BufferedWriter(new FileWriter(file2));
output.write(shellScriptContent);
output.close();
} catch (IOException ex) {
Logger.getLogger(PunchGUI.class.getName()).log(Level.SEVERE, null, ex);
}
So that writes the file just fine, but it is not executable. Is there a way to change the executable status when I write it?
这样就可以很好地写入文件，但它不可执行。有没有办法在我写的时候改变可执行状态？
Edit: To further clarify, I am trying to make it execute by default, so that for instance, if you double clicked the generated file, it would automatically execute.
编辑：为了进一步澄清，我试图让它默认执行，例如，如果你双击生成的文件，它会自动执行。
回答by John Feminella
You can call File.setExecutable()to set the owner's executable bit for the file, which might be sufficient for your case. Or you can just chmodit yourself with a system call with Process.
您可以调用File.setExecutable()为文件设置所有者的可执行位，这对于您的情况可能就足够了。或者您可以chmod自己使用Process.
Alas, full-powered programmatic alteration of file permissions isn't available until Java 7. It'll be part of the New IO feature set, which you can read more about here.
唉，在 Java 7 之前，无法对文件权限进行全面的编程更改。它将成为新 IO 功能集的一部分，您可以在此处阅读更多相关信息。
回答by user49913
You'd need to chmod it, and you can probably do it by exec'ing a system command like such:
您需要对其进行 chmod，并且您可以通过执行如下系统命令来实现：
Really all you'd need is to fire off something like this:
真的所有你需要的是发射这样的东西：
Runtime.getRuntime().exec("chmod u+x "+FILENAME);
But if you want to keep track of it more explicitly can capture stdin / stderr then something more like:
但是如果你想更明确地跟踪它可以捕获 stdin / stderr 那么更像是：
Process p = Runtime.getRuntime().exec("chmod u+x "+FILENAME);
BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
BufferedReader stdError = new BufferedReader(new InputStreamReader(p.getErrorStream()));
Which I got from here: http://www.devdaily.com/java/edu/pj/pj010016/pj010016.shtml
我从这里得到的：http: //www.devdaily.com/java/edu/pj/pj010016/pj010016.shtml
Update:
更新：
Test program:
测试程序：
package junk;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;
public class Main{
private String scriptContent = '#!/bin/bash \n echo "yeah toast!" > /tmp/toast.txt';
public void doIt(){
try{
Writer output = new BufferedWriter(new FileWriter("/tmp/toast.sh"));
output.write(scriptContent);
output.close();
Runtime.getRuntime().exec("chmod u+x /tmp/toast.sh");
}catch (IOException ex){}
}
public static void main(String[] args){
Main m = new Main();
m.doIt();
}
}
On linux if you open up a file browser and double click on /tmp/toast.sh and choose to run it, it should generate a text file /tmp/toast.txt with the words 'yeah toast'. I assume Mac would do the same since it's BSD under the hood.
在 linux 上，如果您打开文件浏览器并双击 /tmp/toast.sh 并选择运行它，它应该会生成一个文本文件 /tmp/toast.txt，其中包含“yeah toast”字样。我认为 Mac 会做同样的事情，因为它的底层是 BSD。
回答by mkobit
In Java 7 you can call Files.setPosixFilePermissions. Here is an example:
在 Java 7 中，您可以调用Files.setPosixFilePermissions. 下面是一个例子：
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.PosixFilePermission;
import java.util.Set;
class FilePermissionExample {
public static void main(String[] args) throws IOException {
final Path filepath = Paths.get("path", "to", "file.txt");
final Set<PosixFilePermission> permissions = Files.getPosixFilePermissions(filepath);
permissions.add(PosixFilePermission.OWNER_EXECUTE);
Files.setPosixFilePermissions(filepath, permissions);
}
}
回答by mouviciel
On Mac OS X, besides chmod +x, you have to give a .commandextension to your shell script if you want to launch it with a double-click.
在 Mac OS X 上，除了 chmod +x，.command如果你想双击启动它，你必须给你的 shell 脚本一个扩展。
回答by Marty Lamb
This answerI wrote for the question how do I programmatically change file permissionsshows a chmod example via a native call using jna, which should work on Mac OS X.
我为如何以编程方式更改文件权限的问题编写的这个答案通过使用 jna 的本机调用显示了一个 chmod 示例，它应该适用于 Mac OS X。
