Database Users

Nexus 7 has root, but

When apps that ask for root permissions are launched, it doesnt work, example: TI backup says that the device isnt rooted and i might have to check the SU binaries. My N7 was rooted before a update for Superuser was available, now something happen after i updated it. But i dont know what...

That's weird. After you updated your SU, did you go to SU to update its binaries?

i did that twice, and it did say to update binaries...so...

you might need SuperSu instead
What Android version are you running?
Droid_Boi86 said:
i did that twice, and it did say to update binaries...so...
Click to expand...
Click to collapse

I had similar problems with "lightly rooted" stock (4.2.1/JOP40D) using a slightly older version of Superuser. Some apps could get root and others could not. But things have been in flux recently; read on...
I poked around a little bit and it appeared that the 4.2 multi-user stuff was interfering with the way that older versions of (ChainsDD's) Superuser worked, and at that time (only a couple weeks ago) ChainsDD had not released a newer update - things were still in flux.
I switched over to SuperSU, and no problems since... but....
...for me, installation of SuperSU didn't go swimmingly. As I recall the SuperSU install instructions say something like "you need to already have root to install the SuperSU `su' binary". Makes sense as it needs to write it's 'su' binary into /system, which in turn means it needs to get root privilege from a pre-existing su/Superuser installation.
So it poses a chicken-and-egg problem if you have lost root completely which I somehow managed to do... wait, I remember now! I had left the old 'su' binary in place, but had manually uninstalled "Superuser" from /system before I attempted the SuperSU install. Doh!
If you have lost root... you can manually install SuperSU offline inside the recovery via adb & the command line, which means getting both the SuperSU.apk and the 'su' binary ahead of time.
You can get the .apk from the market. You can attempt an install - it will download the 'su' binary and (no kidding) place a copy of it in /data/data/eu.chainfire.supersu/files/superuser.png
If you haven't lost root completely inside the booted OS, I suggest mounting /system in "rw" mode prior to running the SuperSU install and startup.
It looks like I am back a version or two - I have superSU v 0.99
4d7abc0eb5898cdb81bc233dcd16e052 /system/app/SuperSU.apk
0034ec008416b1c3fa7010deb8a3a758 /system/xbin/su
-rwsr-sr-x 1 root root 91992 Jan 10 16:40 /system/xbin/su
note the setuid,setgid bits on /system/xbin/su. Also - no symlink from /system/bin/su to xbin/su.
OK, sorry for the long post. There have been new releases from both chainfire (SuperSU) and chainsDD (Superuser) quite recently. Since I haven't had any troubles since 10 January, I haven't been following it closely - YMMV.
cheers

Nexus 7 - permissions issues and rooting

Hey people!
I just got a nexus 7 2012 and i am wanting to mount it in my car. So i wanted to do a few things before that.
I updated to official 5.1.1 via OTA. Everything is STOCK
First step was rooting which SEEMED to work (DID it via WUGS). It installed SU and busybox. Next step was to create my own bootanimation
This is where the issues have started. I can not change permissions or move any files to the system directory even with W/R option turned on
I can delete the files but can not copy files to the directories. I can no change permissions in ANY directory.
I have tried in root explorer mounting r/w ES file explorer R/W ... i tried to install a new busy box and it installs then immediately says "you installed but it seems there is an older version on the system" i can not uninstall busybox. I tried mounting in terminal and it says all partitions are EXT 4. I have tried rerooting. Root check says everything is fine. SU seems to be working fine (it elevates permissions for all the root apps).
But for the life of me it will not copy anything into / or /system. :crying:
Should i just forget it and install another rom, WIPE everything and start again? If ROM which one is the best at the moment (nexus 2012)

After 2-3 hours of messing about... I just TWRP and flashed a different SU and it starting working.

Accidentally uninstalled SuperSU

Hi guys
I am pretty new to android, but i know a lot about pc's.
I have a OP5 and rooted it, but then i had an issue with SuperSU and uninstalled it. What i did not think, is that if i reinstall it, it has no root access, because i can not grant it.
So i tried reinstalling it with TWRP, but it did not get root access.
Does anyone know how to give it root again/reinstall it with root?
(i could reflash the os and reinstall superSU, but i dont want to set uo the phone again)
Also does anyone know the progress on nethunter for OP5?
Thanks and yours
cacciu

Cacciu said:
Hi guys
I am pretty new to android, but i know a lot about pc's.
I have a OP5 and rooted it, but then i had an issue with SuperSU and uninstalled it. What i did not think, is that if i reinstall it, it has no root access, because i can not grant it.
So i tried reinstalling it with TWRP, but it did not get root access.
Does anyone know how to give it root again/reinstall it with root?
(i could reflash the os and reinstall superSU, but i dont want to set uo the phone again)
Also does anyone know the progress on nethunter for OP5?
Thanks and yours
cacciu
Click to expand...
Click to collapse
It's been awhile since I used SuperSU so I might be fuzzy: SuperSU has two components, 1) the .zip portion installed from TWRP and 2) the APK. The zip is like "the framework/service/su" part and the APK is the app that just tracks and loads the DB with which apps or services have been granted SU access.
My question is "Which of these did you uninstall?" : OR: Did you uninstall both? Maybe only uninstalling one or the other causes an 'out of sync' condition.
Anyway: This version of SuperSU https://forum.xda-developers.com/apps/supersu/2014-09-02-supersu-v2-05-t2868133 discussed in that thread has the APK in the .zip file. By definition all TWRP recoveries are rooted and can do what they want to like installing SuperSU.
What happens after you boot seems more likely to be about left-over crud from the APK / DB component, (and I'm guessing here), so if the SuperSU APK is still there, I'd clear it's data entirely, perhaps get rid of it entirely if you can and reinstall the .zip that contains all parts of SuperSU (maybe they all do now) from that link ^^. Make sure that link I gave is the one you want (systemless, etc).
TWRP should've done the heavy lifting during SuperSU install since it's already rooted. If it didn't, then keep the log from TWRP and look over it's install steps during the SuperSU install. Post it here maybe.

Thanks for the answer.
I uninstalled the apk.
I already tried to install the apk directly and also installing it from the zip, and there was either a message like "no root detected" or " root is corrupted".
I also deleted the su folder, uninstalled the apk and reinstalled the zip. But it was always the same: the apk did either say it's not rooted or did not install/show in the apps.
Probably i have to unroot and root it, or do you have any other idea?

TWRP Terminal
I found out, that there is a terminal with root access on twrp. So i searched for eu.chainfire.supersu with the find comman and use chown root:root to give each directory root access. But it still did not recognize the root. So i thought about the db you said and maybe it doesnt recognize the db.
So i tried the same with dsploit as it doesnt run without root, but it's the same.
I will try to delete all the supersu directories as well as any su directory and reinstall the zip. Or if there is an apt-get, i will try it to install it by terminal

Cacciu said:
I found out, that there is a terminal with root access on twrp. So i searched for eu.chainfire.supersu with the find comman and use chown root:root to give each directory root access. But it still did not recognize the root. So i thought about the db you said and maybe it doesnt recognize the db.
So i tried the same with dsploit as it doesnt run without root, but it's the same.
I will try to delete all the supersu directories as well as any su directory and reinstall the zip. Or if there is an apt-get, i will try it to install it by terminal
Click to expand...
Click to collapse
You might be out of luck if you deleted the su directory or any other related to binary su code. I'm not sure why you couldn't do a reinstall of the original SuperSU .zip file. You've got that whole 'catch-22' thing going right now.
The only thing I'm wondering about is whether a certain amount of cleanup has to take place before you can just roll SuperSU*.zip over an old mangled version and get it to work. Do you get errors in TWRP when trying to reinstall the entire package?
---------- Post added at 02:48 PM ---------- Previous post was at 02:05 PM ----------
I downloaded this version of SuperSU (which may or may not be what you used, but you of course want the one you used): http://download.chainfire.eu/1114/SuperSU/SR1-SuperSU-v2.82-SR1-20170608224931.zip
Then I unzipped it and the installer script for not only the binary parts but the apk is here .\SR1-SuperSU-v2.82-SR1-20170608224931\META-INF\com\google\android\updater-binary. (updater-script is a dummy). It's kind of old school and is very easy to understand (the shell script that installs it).
All the files that it pushes onto the SD are easy to find and use, although you have to keep SELinux settings in mind.
It's worth taking a look at if you want to try to rebuild the wrecked version or if you want to just reapply the zip and have a better understanding of any errors it spits out.
Good luck.

Has anyone tried magisk with the TB-8504x/f?

Did it work even with dm-verity?

I got it to work - installed magisk via twrp and was able to use su and run scripts at boot <3

I installed magisk and I can write files to /system, but when I reboot the device the files are removed from /system. What do I need to do so that files that are written to /boot or /system are persisted across reboot?
My main goal is to be able to update init.rc so that I can have the device power on when plugged into a charger

drizzle123 said:
I got it to work - installed magisk via twrp and was able to use su and run scripts at boot <3
Click to expand...
Click to collapse
I use Magic 20.3 or 20.4 on my two tablets.
One tablet is under stock Android 8.1.0
and another is under LineAgeOS16 - Android 9 Pie.
Both, give su for applications and ADB, but don't have system root for system folder.

Unable to modify /system folder

I've looked all over and I'm unable to find a solution or even what's stopping me from modifying the /system folder in the root directory. I can remove files from that folder and all of it's subfolders but I'm unable to add any files into that directory. I am rooted on the T-mobile OnePlus 6t that has been converted to the international ROM. I know my root works cause I can perform other root functions. I also cannot modify the /system folder from TWRP either which is really strange to me. Also, when TWRP prompts me to install the app, it just reboots recovery since it's trying to install it as a system app which I can't do for this odd reason I have yet to find out. This issue all of a sudden showed up after an OTA update and re-rooting after. I have tried reinstalling TWRP, Magisk and Oxygen OS itself but the issue persists. I have also tried running "reboot disemmcwp" as root in a terminal window AND using adb but I guess that command no longer works. Any suggestions welcome as this is the last place I can find an answer to this issue.
Edit: found out I'm unable to uninstall system apps for some reason. So the issue isn't space related.

Toilet Clauger said:
I've looked all over and I'm unable to find a solution or even what's stopping me from modifying the /system folder in the root directory. I can remove files from that folder and all of it's subfolders but I'm unable to add any files into that directory. I am rooted on the T-mobile OnePlus 6t that has been converted to the international ROM. I know my root works cause I can perform other root functions. I also cannot modify the /system folder from TWRP either which is really strange to me. Also, when TWRP prompts me to install the app, it just reboots recovery since it's trying to install it as a system app which I can't do for this odd reason I have yet to find out. This issue all of a sudden showed up after an OTA update and re-rooting after. I have tried reinstalling TWRP, Magisk and Oxygen OS itself but the issue persists. I have also tried running "reboot disemmcwp" as root in a terminal window AND using adb but I guess that command no longer works. Any suggestions welcome as this is the last place I can find an answer to this issue.
Click to expand...
Click to collapse
Known issue that in the Newer OxygenOS versions there is no free space in /system. I'd download Solid Explorer and check the Free Space in the Root Directory.
Sent from my OnePlus6T using XDA Labs

Mannan Qamar said:
Known issue that in the Newer OxygenOS versions there is no free space in /system. I'd download Solid Explorer and check the Free Space in the Root Directory.
Click to expand...
Click to collapse
I've thought about that before. I use root explorer and can see there's more space than needed for the files I want to insert. Is there some buffer space needed in there and how much?

Toilet Clauger said:
I've thought about that before. I use root explorer and can see there's more space than needed for the files I want to insert. Is there some buffer space needed in there and how much?
Click to expand...
Click to collapse
Well, if you go to magisk and select core only mode then reboot you will be able to modify system

toolhas4degrees said:
Well, if you go to magisk and select core only mode then reboot you will be able to modify system
Click to expand...
Click to collapse
I was actually able to find the issue. Space was the issue. I guess there's a space buffer needed from what a file explorer says is left and what's actually left. I uninstalled a couple system apps I disable anyway and was able to insert files/apps into system again.

I made space easy I have the new OnePlus camera apk 125mb the old one is 67mb