Develop Bugs

[Q] Can't write to /system [SOLVED]

Guys, can someone tell me what i'm missing? I followed this guide to root and S-OFF my phone, but just now i realized that i have no write access to /system partition. It isn't very important for me, since i'm flashing only rooted ROMs and when i need to gain write access to /system partition - i'm rebooting into CW Recovery, but... It would be handy to have it anyway
Some info form what i see in fastboot:
VISION PVT ENG S-OFF
HBOOT-0.8.4.2000
RADIO-26.03.02.26_M
Thank you in advance.

Did you verify that you have root? Use the Android Terminal Emulator, type su and if you get a #, you're good to go. If you do have root, just use Root Explorer and hit the R/W button while in the system folder.
Sent from my HTC Vision using XDA App

ScooterG said:
Did you verify that you have root? Use the Android Terminal Emulator, type su and if you get a #, you're good to go.
Click to expand...
Click to collapse
Yes, i'm getting root permissions here.
ScooterG said:
If you do have root, just use Root Explorer and hit the R/W button while in the system folder.
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Click to collapse
When i press mount as R/W, nothing happens and i can't make any changes in /system partition.
Also, i tried Font Changer Lite (from Market), but i'm getting message:
"Write access for the system partition was not established on your device and therefore this application will have to be closed.
Please make sure your device has full root before you try again"
Am i missing something? Thanks for quick reply btw.

Using ADB
1. adb shell
2. mount -o rw,remount -t ext3 /dev/block/mmcblk0p25 /system
3. exit

aznsnake666 said:
2. mount -o rw,remount -t ext3 /dev/block/mmcblk0p25 /system
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Click to collapse
"mount -o rw,remount /system" should work too.
(you need to mount /system specifically as rw, by default it's still mounted read-only even if you have root/S-OFF)

Or simply:
adb remount
Love that No need to remember the blocks and hassle with the mount command

AnyDone said:
Or simply:
adb remount
Love that No need to remember the blocks and hassle with the mount command
Click to expand...
Click to collapse
This is the best way I've found to do it, but it is only temporary.

Thank you guys very much, that worked
Edit: Font Changer Lite still complaining about permissions.

There's a /system remount app in the market lol
Sent from my HTC Vision using XDA App

stevencpoynter said:
There's a /system remount app in the market lol
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Click to collapse
Sure, let's download an app for each ADB command, so then we can complain about having not enough of internal memory again

I know that sounded a little sarcastic lol, was in the bank waiting in line.
Seriously though, there's a one click remount app, its wonderful as I no longer have to use adb or a terminal to make /system rw
Sent from my HTC Vision using XDA App

[Q] how do i remove something from system - without rebooting?

thought i'd post here instead of the oxygen thread.
tried
mount -o remount /dev/block/mtdblock3 /system
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Click to collapse
which gives errors
and
mount -o remount,rw /system
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Click to collapse
which doesn't
was then told to:
mount | grep /system
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Click to collapse
which gives
dev/block/mtdblock3 on /system type yaffs2 (rw,relatime)
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Click to collapse
but i still can't delete a file via root explorer
any idea what i can do to remove files in system without hooking my phone up to my pc?

I believe you need to be S-OFF.
Sent from my HTC Desire using XDA App

i am
stupid 10 chars

You need S-OFF and root access then use Root Explorer, it's what I use. Click the R/O button at the top to R/W and you can delete until your heart is content.

got it, i wasn't using root explorer. i was using .. something else
ta

[Q] Acer A100 on ICS and Rooted but unable to rename files

Hello, I was recently able to upate my A100 to ICS. I followed the root instructions in the developer section and it worked great. Both Titanium Backup and Superuser say I'm rooted but I can't move/rename the wpa_supplicant file. I really need to be able to use ad hoc to tether to my phone. Did I do something wrong in rooting my tablet? Any help would be much appreciated.
Thanks.

You need to mount system as r/w. Which file manager are you using?
Sent from my LG-P999 using Tapatalk 2

How do I enable that? I'm using Root Browser, I never had to do that before in HC...it just worked lol. Thanks for the help.

DravenAcer said:
How do I enable that? I'm using Root Browser, I never had to do that before in HC...it just worked lol. Thanks for the help.
Click to expand...
Click to collapse
I personaly used Root Explorer, its free and it has a friendly little buttong that has R/o R/W which allows you to read only to read and write

I redid the root and reinstalled Superuser, Root Browser, Titanium and Terminal...they all I'm rooted but when I try to move or rename the wpa_supplicant file it says failed. When I try to mount on Terminal it says it can't because I don't have root. What's going on lol? Did I do something wrong or is my version of ICS incompatible with the rooting method? Please help...

DravenAcer said:
I redid the root and reinstalled Superuser, Root Browser, Titanium and Terminal...they all I'm rooted but when I try to move or rename the wpa_supplicant file it says failed. When I try to mount on Terminal it says it can't because I don't have root. What's going on lol? Did I do something wrong or is my version of ICS incompatible with the rooting method? Please help...
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Click to collapse
I noticed the same problem with Root Browser. It is probably not using the standard /system/bin/mount or /system/xbin/mount. Also it may be ZeroNulls mount script not taking in account for all possible mount scenarios. You could try my mount script in this thread forum.xda-developers.com/showthread.php?t=1512787 and replace your /system/bin/mount and /system/xbin/mount.
If you are sure it's rooted then remounting from a terminal will work. Are you typing su before trying to remount?
If you are and it still doesn't work try this instead
Code:
$ su
# mount -o remount,rw /dev/block/mmcblk0p3 /system/
BTW root explorer is not free

eww245 said:
I noticed the same problem with Root Browser. It is probably not using the standard /system/bin/mount or /system/xbin/mount. Also it may be ZeroNulls mount script not taking in account for all possible mount scenarios. You could try my mount script in this thread forum.xda-developers.com/showthread.php?t=1512787 and replace your /system/bin/mount and /system/xbin/mount.
If you are sure it's rooted then remounting from a terminal will work. Are you typing su before trying to remount?
If you are and it still doesn't work try this instead
Code:
$ su
# mount -o remount,rw /dev/block/mmcblk0p3 /system/
BTW root explorer is not free
Click to expand...
Click to collapse
Thanks for your help. I didn't know I had to type 'su' first lol. That worked...kinda. Because I have to retype that everytime I rename or move something. Is that some kind of bug in the script?

DravenAcer said:
Thanks for your help. I didn't know I had to type 'su' first lol. That worked...kinda. Because I have to retype that everytime I rename or move something. Is that some kind of bug in the script?
Click to expand...
Click to collapse
Yes that is a bug in the script. Using my mount script Root Browser is able to modify /system files.

Looks like the old wpa_supplicant file isn't working. I did a search but haven't found any yet that work. Has anyone been able to activate ad-hoc on their A100 with ICS?

eww245 said:
Yes that is a bug in the script. Using my mount script Root Browser is able to modify /system files.
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Click to collapse
Yes, that worked great! Thank you.

[Q] Deleting system file in terminal causes reboot

Hello all,
I'm trying to delete a system file using the Android terminal (as my end goal is to put it in a run shell task in Tasker) and it either reboots my phone or just doesn't delete.
Long story short, I'm using the Weak Sauce root method, but I do not have S-Off as I like how easy it is to undo the Weak Sauce root alone. This means, of course, I don't have immediate RW access to system. So here's what I've done:
Code:
# mount -o rw,remount -t yaffs2 /dev/block/mmcblk0p46 /system
# busybox rm -f /system/media/audio/ui/camera_click.ogg
# mount -o ro,remount -t yaffs2 /dev/block/mmcblk0p46 /system
When I do the first and last commands alone, the system mounts as RW and RO correctly, confirmed with # mount|grep system. But that middle command is the problem. Sometimes nothing will happen, other times my phone will reboot. I've also tried adding the following before the rm command with no success:
Code:
# chmod 777 /system/media/audio/ui/camera_click.ogg
I AM able to delete the file manually through ES File Explorer when mounted RW. But it comes back after I restart my phone, hence why I want this command to be used in Tasker.
What am I doing wrong?
PS: as for the "why" of deleting the shutter sound file, I take screenshots sometimes and the sound drives me nuts. I've tried removing the ogg file from the camera apk, but that didn't work after a reboot. I also tried replacing the ogg file with a silent one, but no success there either as the real one reloads itself when I restart.

Delete the file in recovery using TWRP
Sent from my HTC One_M8 using Tapatalk

SmiLey497 said:
Delete the file in recovery using TWRP
Sent from my HTC One_M8 using Tapatalk
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I'm trying to do it from the terminal so I can eventually put it into Tasker. I can delete it successfully with ES File Explorer, so no need for recovery. I just need some way to get it to work through the terminal.

If the file is coming back then you don't have proper write access to system and the file isn't actually being deleted which Is why it appears to come back.
Try using root explorer instead or do it through TWRP. Make system RW then just move or rename the file rather than delete it. If you have proper write access it will stick.

heather1209 said:
I'm trying to do it from the terminal so I can eventually put it into Tasker. I can delete it successfully with ES File Explorer, so no need for recovery. I just need some way to get it to work through the terminal.
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It comes back when you reboot. Your system is not writable you need to S-OFF. get system RW kernel, or delete through recovery.

SmiLey497 said:
It comes back when you reboot. Your system is not writable you need to S-OFF. get system RW kernel, or delete through recovery.
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Ah, that makes sense. What's the system RW kernel you mentioned? I'm not familiar with that.

heather1209 said:
Ah, that makes sense. What's the system RW kernel you mentioned? I'm not familiar with that.
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Click to collapse
http://forum.xda-developers.com/showthread.php?t=2701816

heather1209 said:
Ah, that makes sense. What's the system RW kernel you mentioned? I'm not familiar with that.
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Click to collapse
[KERNEL] [June 20] [Sense] [GPE] ElementalX 0.19 I think that'll work on stock Sense system.

heather1209 said:
Ah, that makes sense. What's the system RW kernel you mentioned? I'm not familiar with that.
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Click to collapse
He means flash a kernel that has write access to system enabled.

SmiLey497 said:
http://forum.xda-developers.com/showthread.php?t=2701816
Click to expand...
Click to collapse
Or yeah, the MOD can work too :good:

Finding /system in /proc/mounts

hello, I need to mount to the system as R/W in order to delete a file in my root directory, but I can't find the right location I order to mount it with my terminal. I'm rooted with Magisk and Busybox
thx

shaitan240 said:
hello, I need to mount to the system as R/W in order to delete a file in my root directory, but I can't find the right location I order to mount it with my terminal. I'm rooted with Magisk and Busybox
thx
Click to expand...
Click to collapse
I got full control I use totale comandet give it root in settings of the app then u can delete any thing u want

roadkill42 said:
I got full control I use totale comandet give it root in settings of the app then u can delete any thing u want
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Click to collapse
I found "total commander" in the play store, if it's that one, thank you it really worked

shaitan240 said:
I found "total commander" in the play store, if it's that one, thank you it really worked
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Click to collapse
Yep that's it kinda dos looking I think easier then any others u can even drag and drop wifi file transfer to

shaitan240 said:
hello, I need to mount to the system as R/W in order to delete a file in my root directory, but I can't find the right location I order to mount it with my terminal. I'm rooted with Magisk and Busybox
thx
Click to expand...
Click to collapse
For future issues:
Magisk mirrors all relevant partitions under /sbin.
The path to the block device /system is (only for system_as_root devices!!)
Code:
/sbin/.magisk/block/system_root
and it's mounted under
Code:
/sbin/.magisk/mirror/system_root
If you want to mount /system as r/w, you need this command
Code:
mount -o rw,remount -t ext4 /sbin/.magisk/block/system_root /sbin/.magisk/mirror/system_root

WoKoschekk said:
For future issues:
Magisk mirrors all relevant partitions under /sbin.
The path to the block device /system is (only for system_as_root devices!!)
and it's mounted under
If you want to mount /system as r/w, you need this command
Click to expand...
Click to collapse
Thank you this is exactly what I was looking for, but the other method worked for me too
But it is appreciated