[Q] SU Command from hook topic

SOCIALIZE IT ⇨


Im trying to run a su command from within a hook,



Code:

Process p;
    try {
    // Preform su to get root privledges
    p = Runtime.getRuntime().exec("su");

    // Attempt to write a file to a root-only
    DataOutputStream os = new DataOutputStream(p.getOutputStream());
    os.writeBytes("echo \"Do I have root?\" >/system/sd/temporary.txt\n");

        // Close the terminal
        os.writeBytes("exit\n");
    os.flush();
    try {
    p.waitFor();
    if (p.exitValue() != 255) {
        toastMessage("root");
        return true;
        } else {
        toastMessage("not root");
    }
    } catch (InterruptedException e) {
        toastMessage("not root");
        }
    } catch (IOException e) {
        toastMessage("not root");
    }


But even though I grant the shell su access I still get error:
tmp-mksh: <stdin>[1]: can't create /system/sd/temporary.txt Read-only file system
Any ideas?




xda-developers


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