Shutdown Remote Computer in Java- Cannot initiate shutdown but no errors

Question

I am learning about the Runtime class in java, and am testing the use of command line instructions in it. I am trying to remotely shutdown a computer using Runtime.getRuntime().exec(...); When I run this, there are no errors, but the specified machine does not shut down. I don't know why.

Code:

import java.io.IOException;

class shutdownVirus {
    public static void main(String[] args) throws IOException {
        Runtime.getRuntime().exec("shutdown -m \\\\T12-LEOPARDIJ -s -t 10");
    }
}

Any help will be greatly appreciated. Thanks

Does the command work as expected when you run it directly from your command line (without Java in between)? — Thilo, Jun 25 '12 at 04:16
The `exec` method returns a `Process` object. Wait some time after calling it and check for the `exitValue` of the returned `Process` object and/or check if there is something written to standard or error out by reading from the streams returned by `getInputStream()` and `getErrorStream()`. — siegi, Jun 25 '12 at 04:22
how would you wait time after calling process object? and are you saying read from the streams from the process object? — Bl H, Jun 25 '12 at 04:25
May be you would like to try [this][1]. [1]: http://stackoverflow.com/questions/25637/shutting-down-a-computer-using-java — Anuj Balan, Jun 25 '12 at 04:40

score 2 · Answer 1 · answered Jun 25 '12 at 04:39

2

It probably does not work because the VM you are running the Java class with is started from a user that does not have shutdown rights. The process would inherit these access restrictions and therefore no be allowed to shut down.

Arguably thats a good thing..

answered Jun 25 '12 at 04:39

Manfred Moser

29,539
13
92
123

By saying "arguably thats a good thing..." are you implying that I am attempting this for malicious means? Don't jump to conclusions... – Bl H Jun 25 '12 at 04:52
I am not. Malicious or not the JVM should not be able to run anything outside the OS security constraints. I am not implying that you are doing something malicious. I am implying that you should get the right access rights to do what you want to do. – Manfred Moser Jun 25 '12 at 16:05

Kumar Vivek Mitra · Accepted Answer · 2012-06-25T06:20:36.583

1

Try

Runtime.getRuntime().exec("shutdown -s");

Edited part:

Use this.

shutdown /s /m <Computer_Name> To shutdown a remote PC

edited Jun 25 '12 at 06:20

answered Jun 25 '12 at 04:35

Kumar Vivek Mitra

33,294
6
48
75

That works, but did YOU know that shutdown -s only shuts down the user, not a remote computer? – Bl H Jun 25 '12 at 04:49
shutdown /s /m – To shutdown a remote PC – Kumar Vivek Mitra Jun 25 '12 at 06:12

Shutdown Remote Computer in Java- Cannot initiate shutdown but no errors

2 Answers2

Linked