I've followed the following thread CF-root 4.1.
Everything went fine and the kernel is rooted.
I can use apps which require root, like TitaniumBackup.
I also can use su to gain root privileges and also adb shell and then su. To make this more clear. I first get $ (user priv) and then with "su" i get # (root priv).
For this reason i can't use the adb push method, because i'm not root directly.
adb root which is suggested in a couple of threads isn't helping me. I get the following output. "adbd cannot run as root in production builds".
How can i fix it, so i can have root privileges directly when connecting via the adb shell?
You need an "insecure kernel" for that.
There are several for download in a thread in the dev section.
Why do you need ADB to be running as root for pushing, if you don't mind asking?
bla
HellcatDroid said:
You need an "insecure kernel" for that.
There are several for download in a thread in the dev section.
Why do you need ADB to be running as root for pushing, if you don't mind asking?
Click to expand...
Click to collapse
Many thanks for illuminating people in this situation!
Cuz it's obviously more comfortable to do stuff using the computer's keyboard.
Ive pushed all kinds of other stuff, I did do the add system enviromental variable to XP so this could be my issue, though like i said its worked for other things ...
ERROR I GET>
CANNOT STAT
adb push stock-hc-flyer-hboot_1.11.0006.nb0 / && adb shell dd if=/stock-hc-flyer-hboot_1.11.0006.nb0 of=/dev/block/mmcblk0p18
NO SUCH FILE OR DIRECTORY
a thourough explanation or a cut and pastable pointing my adb to this file, its in the root, the variable is to the root C also, so....
PLEASE HELP, to get me past this 10+hours of hell
May be a connection between your computer and phone issue. I have this error when I wanted to root my nexus s. Try different driver for your flyer.
Accidentally sent from my Google Nexus S using XDA Premium
Make sure the adb works via "adb devices" and "adb shell". If it does not work you can try "adb kill-server" first.
I don't think you can write (push) to "/" without "adb remount". Not sure if it is a good idea to write to root directory.
Alternatively, you can use the storage in /data/local/tmp, it is always writable.
Hello sir! I just wana ask question on how to run commands like this
su -c /system/etc/CrossBreeder/REMOVE_TETHER_BOOST
i've seen this in the Cross Breeder thread. I just wanna try it to reduce the lag on my phone and maybe also to speed it up!
but if i came across with this unexpected problems . i really dont know how to run this commands. so i just wanna ask . how do i run commands like that? THANKS IN ADVANCE
These commands are run via a terminal emulator on your phone. For this command, your phone have to be rooted.
Alternatively, you can use adb shell. To do so, you have to download the android sdk or google for adb for just downloading the relevant part of it, then you have to run adb root to get root privileges (the adb binary can be found under Path/to/Android-SDK/platform-tools) and adb shell to get a root shell. There you have to type in /system/etc/CrossBreeder/REMOVE_TETHER_BOOST (the su -c is not needed there because you already have root privileges).
Hello,
Veteran SW guy here; but newbie at Android.
I have three tablets. All of them are Ematic Model EGS004. All three were bought for the sole purpose of being used by children to watch educational videos (in mp4 and flv formats) and read PDF documents. Absolutely nothing else. No games. No internet access whatsoever. Etc.
Two of the tablets are still in the box and have not been touched. I'm hoping that they may be useful for making/restoring an original image of the tablets.
To implement the requirements of this project, I did the following to one of the tablets:
1) Used the instructions at http://forum.xda-developers.com/showthread.php?t=2495069 to get root access with Cydia Impactor and Chainfire SuperSU.
2) Installed Titanium Backup (root). Using this, I uninstalled most of the Google applications (excluding Google Play), messager, YouTube, games, etc.
3) Installed File Manager (Explorer) by Rhythm Software.
4) Installed Shell Terminal Emulator by MobilDev. Using the shell, I went to the /system/lib directory and renamed libwifidisplay.so
and libwpa_client.so to libwifidisplay.disabled and libwpa_client.disabled.
Unfortunately, upon reboot, the tablet gets stuck in the bootup screen (with the ematic logo). Obviously, something about Android causes a hang if an expected kernel module is missing...
I tried using the shell in Cydia Impactor. But, the file system was read only. I tried:
mount -o rw,remount /system
But, I get an "Operation not permitted" since I am not root.
I downloaded the ADB bundle for windows at http://developer.android.com/sdk/index.html#download and successfully installed adb on my PC. I could get into a shell with the "adb shell" command. But, the /system/lib directory still is read only and I can't seem to remount it since I am not root.
I tried "adb remount". "Operation not permitted" was the result, again.
Cydia Impactor installs its "su" binary in /system/xbin. I tried running it from there using various invocations like "su -c mount -o rw,remount /system" Each time, the shell hung and I never got a shell prompt afterwards.
Questions:
1) Surely there's a way that I can get back in to rename these files now... I can "ls" them from the adb shell. I can pull them to my PC with adb pull. (adb put doesn't work either since the file system is read only.) Ideas?
2) Once I get this solved, what is the best way to get rid of the wireless capability so that children can never use it? I would like to move videos and PDF's between it and a PC strictly via USB.
3) Is there a way to image/restore one of the untouched tablets - or, for that matter, this one once its up and running like it needs to be?
Thanks everyone!
Jim
Let's try a simpler question since there have been no responses:
Once I get into a shell (non-root) using ADB or Cythia Impactor, I believe I can rename the files if I can only get SuperSU to work. However, when I invoke su, the shell hangs:
su -c ls
su
etc. All of these hang. I assume that SuperSU is waiting for a confirmation from the android display. But, since I'm stuck at the startup screen, there's never an opportunity. How can I get the shell to interact with me as root so that I can remount the file system as RW and rename files?
Thanks,
Jim
rivkah613 said:
Hello,
Veteran SW guy here; but newbie at Android.
I have three tablets. All of them are Ematic Model EGS004. All three were bought for the sole purpose of being used by children to watch educational videos (in mp4 and flv formats) and read PDF documents. Absolutely nothing else. No games. No internet access whatsoever. Etc.
Two of the tablets are still in the box and have not been touched. I'm hoping that they may be useful for making/restoring an original image of the tablets.
To implement the requirements of this project, I did the following to one of the tablets:
1) Used the instructions at http://forum.xda-developers.com/showthread.php?t=2495069 to get root access with Cydia Impactor and Chainfire SuperSU.
2) Installed Titanium Backup (root). Using this, I uninstalled most of the Google applications (excluding Google Play), messager, YouTube, games, etc.
3) Installed File Manager (Explorer) by Rhythm Software.
4) Installed Shell Terminal Emulator by MobilDev. Using the shell, I went to the /system/lib directory and renamed libwifidisplay.so
and libwpa_client.so to libwifidisplay.disabled and libwpa_client.disabled.
Unfortunately, upon reboot, the tablet gets stuck in the bootup screen (with the ematic logo). Obviously, something about Android causes a hang if an expected kernel module is missing...
I tried using the shell in Cydia Impactor. But, the file system was read only. I tried:
mount -o rw,remount /system
But, I get an "Operation not permitted" since I am not root.
I downloaded the ADB bundle for windows at http://developer.android.com/sdk/index.html#download and successfully installed adb on my PC. I could get into a shell with the "adb shell" command. But, the /system/lib directory still is read only and I can't seem to remount it since I am not root.
I tried "adb remount". "Operation not permitted" was the result, again.
Cydia Impactor installs its "su" binary in /system/xbin. I tried running it from there using various invocations like "su -c mount -o rw,remount /system" Each time, the shell hung and I never got a shell prompt afterwards.
Questions:
1) Surely there's a way that I can get back in to rename these files now... I can "ls" them from the adb shell. I can pull them to my PC with adb pull. (adb put doesn't work either since the file system is read only.) Ideas?
2) Once I get this solved, what is the best way to get rid of the wireless capability so that children can never use it? I would like to move videos and PDF's between it and a PC strictly via USB.
3) Is there a way to image/restore one of the untouched tablets - or, for that matter, this one once its up and running like it needs to be?
Thanks everyone!
Jim
Click to expand...
Click to collapse
Erratic Ematic
rivkah613 said:
Let's try a simpler question since there have been no responses:
Once I get into a shell (non-root) using ADB or Cythia Impactor, I believe I can rename the files if I can only get SuperSU to work. However, when I invoke su, the shell hangs:
su -c ls
su
etc. All of these hang. I assume that SuperSU is waiting for a confirmation from the android display. But, since I'm stuck at the startup screen, there's never an opportunity. How can I get the shell to interact with me as root so that I can remount the file system as RW and rename files?
Thanks,
Jim
Click to expand...
Click to collapse
I rooted my son's EGS004, installed busybox, and played around with it without any apparent problem. When I rebooted it, I was prompted to set up the device then and every subsequent time I rebooted it. I could not install any apps and could not redo the Cydia Impactor rooting procedure. The reason was that /data was reporting itself as 0.00B in size. Factory reset didn't change anything. Ematic wants me to return it.
Your issue sounds different, but it could be something as simple as the device being very unforgiving. There's a pinhole with a reset button (never worked for me but tech support suggested it) which may help.
I actually have got a prerooted business device by the device manufacture. Trough adb shell I’m instantly have su permissions without need to use the “su” command.
My app needs for certain operations root permissions. For instance, setting sim-pin by my app is possible, so it seems like, the app has all the root permissions.
My problem is: the app uses some shell commands. e.g. to set the systemtime. But that seems not to work.
On consumer devices like Samsung s4, after rooting the device and installing chainfire su app, setting the systemtime works fine.
My business device coming without preinstalled su-app, so I tried to install chainfire’s su app v 2.46 as a systemapp. But his app told me, my su binaries which comes from the prerooted device aren’t up to date.
So I tried to override them by chainfire’s su binaries to system/xbin, but after that, the su app told me there are no su binaries installed…
How can I execute shell commands from my app with root permissions?
hi
Did you poot afterwards? Look here poot.apk . If your device reboots it should have worked. Or... You can download the debian noroot app from google play store and just use the root terminal if you want to wait for (probably) nearly a 1gb app for only that purpose