Android Tutorial Running shell commands as SuperUser

Erel said:

You can try to list the files in a restricted folder (ls).

Click to expand...

Today I'm searching for a way to check root too. Erel, isn't it true that one can always restrict access to such folders, even in root mode? Thus, how can I be sure that the phone is unrooted if I get an error with ls?
From what I see googling, it is not an easy path to really say if the phone is rooted or not. Any ideas would be greatly appreciated.

Probably data folder is always restricted without root permission.
Note that I am saying root permission.If user don't grant you root permission then you cannot say anything. You will have to treat it as unrooted.

Any user cannot block read permission to data folder. So ls command will work if root permission is provided to your app.

Hi
I want update APK silently (without user confirmation) for rooted device and found the following code:
protected void raise_notification() {
String update_file = preferences.getString(UPDATE_FILE, "");
boolean silent_update_failed = preferences.getBoolean(SILENT_FAILED, false);
if( update_file.length() > 0 && !silent_update_failed ) {
final String libs = "LD_LIBRARY_PATH=/vendor/lib:/system/lib ";
final String[] commands = {
libs + "pm install -r " + context.getFilesDir().getAbsolutePath() + "/" + update_file,
libs + "am start -n " + context.getPackageName() + "/" + get_main_activity()
};
execute_as_root(commands); // not supposed to return if successful
preferences.edit().putBoolean(SILENT_FAILED, true).commit(); // avoid silent update loop
}
super.raise_notification();
}


How to compose the strings of "pm install" and "am start" with B4A?

context.getFilesDir().getAbsolutePath() = File.DirRootExternal

I guess that you know the package name. It should be <package name>/.main

Erel said:

context.getFilesDir().getAbsolutePath() = File.DirRootExternal

I guess that you know the package name. It should be <package name>/.main

Click to expand...

Ok. thank you very much. Please look at http://www.b4x.com/android/forum/threads/update-application-apk.19304/#post-251753
I checked it on my rooted device and it works

m0narX said:

if you want run any shell command as superuser(you must have rooted phone), try this:

B4X:

Dim Command, Runner As String
Dim StdOut, StdErr As StringBuilder
Dim Result As Int
Dim Ph As Phone
Runner = File.Combine(File.DirInternalCache, "runner")
Command = File.Combine(File.DirInternalCache, "command")
File.WriteString(File.DirInternalCache, "runner", "su < " & Command)
File.WriteString(File.DirInternalCache, "command", "modprobe cifs" & CrLf & "modprobe aufs" & CrLf & "exit") 'Any commands via crlf, and exit at end
Result = Ph.Shell("sh", Array As String(Runner), StdOut, StdErr)
Msgbox(StdOut.tostring, "")

Click to expand...

I get this error:
Unknown Type: Phone

You should add a reference to the Phone library (in the libraries tab).

Hi all !
if I send command in ADB shell /system/bin/sunxi-pio -m PA8=0 this is work OK
If I write :
Command = File.Combine(File.DirInternalCache, "command")
File.WriteString(File.DirInternalCache, "runner", "< " & Command)
File.WriteString(File.DirInternalCache, "command", "/system/bin/sunxi-pio -m PA8=0" & CRLF & "exit") 'Any commands via crlf, and exit at end
Result = Ph.Shell("sh", Array As String(Runner), StdOut, StdErr)
This is not work Why? (ORANGE PI H3Droid i have ROOT ) Snx.

Please start a new thread in the questions forum.