[TOOL] SimpleSU v0.7

_n0p_ · 10:44 AM

[TOOL] SimpleSU v0.7

So.
As i was slowly preparing DSC v2.0 i met a hard decision: what root tool to include

Both Superuser and SuperSU are nice, but quite heavy

I decided to take my own way - rewrite su executable itself to suit my vision:

I've aknowledged that i have not modified my root access list for half a year. I don't need and don't want a separate Java process to control root access. I want a simple way to allow root access for application (via whitelist), but block unwanted (i.e. all not in list). Still, it should allow end-user to install either SuperSU or Superuser.
In short - ideal su solution for myself that should also work good for depersonalized custom ROM (with predefined access list), leaving it to end-user to decide which app he will install for superuser access.
And i didn't find a ready solution, so decided to write my own.

Here it is (attached):

SimpleSU
Simplest and lightest superuser solution (with access control)

How it's done:
Same as usual SU for Linux with control access list read from /system/etc/dsc.su_list
dsc.su_list structure is very simple:
One line per android app (case sensitive), windows and unix line breaks should be supported fine.
Current proposed list for DSC 2.0 (and an example):

Caller process tree is walked till init, if match is found, access is granted.

How to install?
Via adb shell:

Code:

adb push su /system/xbin/
adb shell chmod 6755 /system/xbin/su
adb push dsc.su_list /system/etc
adb shell chown root.root /system/etc/dsc.su_list
adb shell chmod 644 /system/etc/dsc.su_list

Note that you have to manually add entries to white list (/system/etc/dsc.su_list) to grant root access in form of app full Java class name. For example, it's com.keramidas.TitaniumBackup for Titanium Backup.

As pointed by dr911, works in multiuser environment (being a linux binary).

Currenly SimpleSU supports two command formats:

Usual: su -c 'make me a sandwich'. Note that only "-c" works now. Seems to be enough though. Command simply passed to the shell.

Legacy (as seen in Google/Android su source): su username make me a sandwich. Shell is not executed in this case, so no environment variables right now in this format.

Have fun,
Sergei.

Changelog:
02.04.2013: v0.7. ":service" suffix granted root access for already granted app, more logging on reject. (0.6 had only more logging)
27.11.2012: GUI updated - forgot about remounting /system in rw mode. Attached to this post.
21.11.2012: GUI done. http://forum.xda-developers.com/show...5&postcount=41
14.11.2012: v0.5. LD_LIBRARY_PATH fixup (taken from ChainsDD), pointed by Rupert Rawnsley. Also some legacy format command-line handling changed. Also, insecure version added (no checks made, asked=granted).
11.11.2012: v0.4. Code cleanup, no longer beta, revised and fixed code with potential string overflows.
09.11.2012: v0.3b. Code changed to allow legacy format command execution.
09.11.2012: v0.2b. Fixed call with multiply parameters. OpenVPN installer works. Dynamic linking, so very small binary. Logging to system log.
07.11.2012: Fixed segmentation fault on reject, added version and build date, removed debug info.

_n0p_ · 8th November 2012, 11:54 AM

A request:
If somebody owns Pro/Elite/other commercial Superuser or SuperSU - would you provide it's full Java class name?

For example, it's

eu.chainfire.supersu
com.noshufou.android.su

for free versions.

arryhariyadi · 8th November 2012, 12:50 PM

eu.chainfire.supersu.pro

Sent from my Amazon Kindle Fire using Tapatalk 2

Androidmarketuser · 9th November 2012, 11:32 PM

Can I avoid these little delays (the appearing popup of SuperSU or Superuser) with this alternative?
And if I have Superuser preinstalled can I delete it and are there other files which belongs to it and can be deleted?
Thank you for sharing your work

ItzCrooK2UxD · 9th November 2012, 11:39 PM

com.noshufou.android.su.elite for Superuser Elite

Shree_Jamdar · 10th November 2012, 01:07 AM

Hi

Have you noticed any improvement in terms of speed etc? Is superuser really that heavy? How much RAM can i get by using this and ditching the superuser app? We can use this in our Galaxy 3 forum !

karandpr · 10th November 2012, 02:46 AM

Get the list of all android activities from here
http://activities.droidicon.com/

pawan1993 · 10th November 2012, 05:26 AM

Quote:

Originally Posted by Androidmarketuser

Can I avoid these little delays (the appearing popup of SuperSU or Superuser) with this alternative?
And if I have Superuser preinstalled can I delete it and are there other files which belongs to it and can be deleted?
Thank you for sharing your work

Delete system/xbin/su and uninstall your superuser app from the system.

_n0p_ · 10th November 2012, 10:22 AM

Oh. Looks SimpleSU got in news

Quote:

Originally Posted by Androidmarketuser

Can I avoid these little delays (the appearing popup of SuperSU or Superuser) with this alternative?
And if I have Superuser preinstalled can I delete it and are there other files which belongs to it and can be deleted?
Thank you for sharing your work

You won't experience any delays - but in cost of manually editing the list. And no popups, it's simply a linux binary. After replacing su binary you may uninstall Java part.

Quote:

Originally Posted by Shree_Jamdar

Have you noticed any improvement in terms of speed etc? Is superuser really that heavy? How much RAM can i get by using this and ditching the superuser app? We can use this in our Galaxy 3 forum !

I did experience lags when using Superuser and SuperSU. I don't think modern device would benefit from SimpleSU. I expect to free 15-20MB. Good for Streak with 512MB.
I may eventually write a list editor, but most probably won't.

Again, this tool would do as preinstalled SU solution in Custom ROM (though i can't test >2.3 compatibility):
Grant predefined (and included in ROM) apps the superuser rights.
Allow end-user to choose and install he's preffered SU solution right from Play Store.

--
Have fun,
Sergei

Androidmarketuser · 10th November 2012, 12:47 PM

Quote:

Originally Posted by _n0p_

You won't experience any delays - but in cost of manually editing the list. And no popups, it's simply a linux binary. After replacing su binary you may uninstall Java part.

I did experience lags when using Superuser and SuperSU. I don't think modern device would benefit from SimpleSU. I expect to free 15-20MB. Good for Streak with 512MB.
I may eventually write a list editor, but most probably won't.

Again, this tool would do as preinstalled SU solution in Custom ROM (though i can't test >2.3 compatibility):
Grant predefined (and included in ROM) apps the superuser rights.
Allow end-user to choose and install he's preffered SU solution right from Play Store.

--
Have fun,
Sergei

Exactly what I searched, thanks

I will test it on my old Desire with Android 4.1, I can tell you whether it's compatible or not.