Android Tutorial Running shell commands as SuperUser

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

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, "")

 

[Erel]

Very nice. You are creating a SH script and then run it. Thank you for sharing.

 

[anaylor01]

I put this script in a button click event and I get the error Object should first be initialized (StringBuilder). on this line.

Result = Ph.Shell("sh", Array As String(Runner), StdOut, StdErr)

 

[Erel]

Did you declare Ph? It should be a Phone object.

 

[anaylor01]

I put the code exactly as it is in the button click event. The code has Dim Ph as phone. Is there something else I need to do ?

 

[Erel]

Sorry, the problem is actually with StdErr and StdOut. You should call Initialize on each of them.

 

[anaylor01]

Sorry but I am new to this and am still figuring things out. So if you could show me the code I would appreciate it. Thanks.

 

[Erel]

Add this code before calling Ph.Shell:

StdOut.Initialize
StdErr.Initialize

 

[anaylor01]

Thank you. This is awesome.

 

[anaylor01]

Maybe you can help me with this. I am trying to remove the SMS limit. I found some information on the net but am having trouble getting it to work. How to Increase the SMS Limit on AndroidIt keeps saying "No Such Table". Here is what I have so far.

SQL1.Initialize(File.DirInternal, "settings.db", True)
lblsendingto.Text =  SQL1.ExecQuerySingleResult("SELECT count(name) FROM secure")'system name secure name gservices Name value

 

[Erel]

Please start a new thread for this question in the questions sub forum.

 

[fpdianzen]

hi!

hi thank you for this info, yet im still confused.
i wanted to enter this, shell commands.
what format should i use? :sign0104:

#su
#setprop ctl.stop adbd

 

[Erel]

You should not post duplicate questions. It has been answered here: http://www.b4x.com/forum/basic4android-updates-questions/14648-shell-root.html#post83008

 

[madSac]

One ques.
How can i check if a device has SuperUser or not ?
or say device is rooted or not ?

 

[Erel]

You can run a script that will fail on unrooted devices and check the error string.

 

[madSac]

You can run a script that will fail on unrooted devices and check the error string.

Any basic command which will have no effect ?
I don't know anything about shell commands but I came to know its potential in this forum only.Even thought I rooted my phone much before but never tried to run shell commands.

 

[Erel]

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

 

[madSac]

whenever i use this code

Dim p As Phone
Dim sb,se As StringBuilder
sb.Initialize
se.Initialize
p.Shell("ls",Null,sb,se)
Log(sb)
Log(se)

i get

opendir failed, Permission denied

in logs.
i have setting to prompt for access in SU but i get No prompt for superuser permission and this error in log.Am i mistaken somewhere ?

 

[Erel]

You should follow the example in the first post.

 

[madSac]

Ok.
I tried it, it worked.
Thank You Erel and m0narX.