execute reboot command from application

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Hi

I'm trying to get a reboot application working.

It should get root through "su" and then execute "reboot".
It does, but nothing happens (su request shows up)

I used several ways to execute the commands.
The ShellInterface classs from MarketEnabler and this snippet http://www.anddev.org/root_access_snippet-t8384.html
"su" then "reboot" -> nothing
"su -c reboot" -> nothing...

Always the same, it looks like it worked but the device is still up :P
adb logcat says nothing about.

What's wrong?

I'm running it directly on HTC Hero rooted of course

I've had this issue on several ROMs. I guess some just don't support the command.. *shrug*

It should work...

The reboot binary is present :P

Hello out there. Looks like you just have a tiny error with your code.

"su -c reboot" needs to look like so: "su -c 'reboot'" -- the actual command to be executed has to be in quotes.

That sould work without the quotes

Still can't find the problem.

I chowned and chmodded the reboot binary like the su binary still no change

how does adbd do it without root permission?

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the adb daemon on the device has to be able to do it to be able to respond to 'adb reboot' on a non-rooted phone. Anybody know how it is able to perform the reboot?

Try this, i can confirm it works fine

try {
            Process process = Runtime.getRuntime().exec("su");
        DataOutputStream os = new  DataOutputStream(process.getOutputStream());
         {
           os.writeBytes("reboot\n");
           os.flush();
        process.waitFor();
        }

        } catch (IOException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

Originally Posted by Meltus

Try this, i can confirm it works fine

try {
            Process process = Runtime.getRuntime().exec("su");
        DataOutputStream os = new  DataOutputStream(process.getOutputStream());
         {
           os.writeBytes("reboot\n");
           os.flush();
        process.waitFor();
        }

        } catch (IOException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

This requires a rooted phone. How does adbd reboot on a non rooted phone?

Originally Posted by Meltus

Try this, i can confirm it works fine

try {
            Process process = Runtime.getRuntime().exec("su");
        DataOutputStream os = new  DataOutputStream(process.getOutputStream());
         {
           os.writeBytes("reboot\n");
           os.flush();
        process.waitFor();
        }

        } catch (IOException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

It works on some, doesn't work on others. Seems to be something with how the phone is rooted, or how permissions are set, not exactly sure. Either way, just because it works for you doesn't mean it will work for everyone, however the code up there is probably a very good example for an implementation.

Some apps like ROM Manager have their reboot written using the NDK, so that may be a reason why they can reboot whereas other apps which try to reboot fail.

Originally Posted by Meltus

Try this, i can confirm it works fine

        process.waitFor();

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