对于chmod命令，Java中的权限被拒绝错误 [英] Permission denied error in Java for chmod command

问题描述

我有一个可执行文件（ffmpeg），我正在尝试使用Mac上的Java程序运行。我使用Java程序将命令 chmod 777 / path /发送到/ ffmpeg ，但是当我尝试运行ffmpeg时，我收到以下错误：

I have an executable file (ffmpeg) that I'm trying to run with a Java program on a Mac. I used the Java program to send the command chmod 777 /path/to/ffmpeg, but when I try to run ffmpeg, I get the following error:

java.io.IOException: Cannot run program "/Users/james/WalkTheHall/ffmpeg": error=13, Permission denied

但是当我从 chmod 777 / path / to / ffmpeg 运行时在打开Java应用程序之前我自己的终端，ffmpeg的命令将在Java程序中运行得很好。

But when I run chmod 777 /path/to/ffmpeg from Terminal on my own before opening the Java application, the command to ffmpeg will run just fine in the Java program.

调用之间是否有区别？ chmod 来自Java程序并自己调用它？为什么它不起作用？谢谢！

Is there a difference between calling chmod from within the Java program and calling it on my own? Why will it not work? Thank you!

推荐答案

我猜这个 chmod 是一个shell命令，而不是可执行文件。尝试通过shell运行 chmod 。在此处查看更多详细信息：想从Java调用linux shell命令

I'd guess that chmod is a shell command, not an executable. Try running chmod through your shell. See more details here: Want to invoke a linux shell command from Java

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