CODEWITHSUNDEEP
androidcadb
codester
codester

Reputation: 56

Executing a Root access based commands on Android application

I basically want to start a process which resides in /system/bin/... from the Application java command. I tried all types of Runtime.process.exec() options Tried the su and ouputStream combination as well, but nothing is able to start the application. I am using the code in device and emulators, no luck in both. I am able to run the same commands from ADB Shell successfully (as it has root permissions).

The device is rooted, I am able to see the # when I use adb to debug my device and it also can go into su via adb. based on my searching I found that (after doing ps from adb shell) I am able to run any command with lrwz--x--x permission such as (ls->toolbox, ps->toolbox) from the application layer but I am not able to execute any other commands which are not linked to the toolbox.

This doesn't execute ls:

Process p = Runtime.getRuntime().exec("su");
DataOutputStream os=new DataOutputStream(p.getOutputStream());
os.writeBytes("ls \n");
os.flush();

But this does execute ls:

Process p = Runtime.getRuntime().exec("ls");

I would really appreciate if I can get any help on this here! I am posting this after doing lots of research.

Upvotes: 1

Views: 3992

Answers (2)

sarnold
sarnold

Reputation: 104080

Rather than sending ls \n to the su command's standard input, try running:

su -c ls

The -c option to su(1) asks it to run a command with elevated privileges rather than starting an interactive shell.

Upvotes: 2

Kapil Jituri
Kapil Jituri

Reputation: 1261

Try creating a shell script file(eg: init.sh) and write following commands in it:

su

reboot

Now try executing this shell script by Runtime.getRuntime().exec("sh init.sh");

If this restarted your droid then you can write your required code in init.sh file & run it.

Upvotes: 0

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