How to Write Permission to System/app in Android

Question

how to give write permission to system/app folder i have rooted my android device i want to download the app and install in system/app folder

Process p = Runtime.getRuntime().exec( "su" );

i had tried this command it ask for user permission and then it throws exception system/app is read only file system

The file system must be remounted with write permissions. – slayton Mar 04 '13 at 04:48 — slayton, Mar 04 '13 at 04:48

score 9 · Answer 1 · answered Dec 25 '13 at 15:14

9

First go to shell using

adb shell

Then remount the system folder as writable using following commands

$ su
# mount -o remount,rw -t yaffs2 /dev/block/mtdblock3 /system

Then change the permission of system folder to Read, Write and Execute using

# chmod 777 /system/app

answered Dec 25 '13 at 15:14

VishalKale

Should I change the permissions back to 755 after I do this? – simonsays Feb 02 '14 at 17:25
No need once your process that changed the permission gets killed, your permissions will be reset to read-only. – VishalKale Feb 03 '14 at 09:29

Shiv · Answer 2 · 2013-03-04T04:58:47.017

3

Just type in your android device terminal

su

and then

       chmod 777 system/app

su- grants you superuser permission

and chmod 777 file, change the permissions of the file to read, write, and execute..

edited Mar 04 '13 at 04:58

answered Mar 04 '13 at 04:51

Shiv

@drdrej that's because you aren't rooted. You need root to install anything in the /system partition on standard devices. – Allison Aug 08 '16 at 00:50

score 1 · Answer 3 · edited May 23 '17 at 12:16

1

Try adb remount in terminal. If you want to do it from the device shell, see this question on how to remount the file system with write permission.

edited May 23 '17 at 12:16

Community

answered Mar 04 '13 at 07:25

3 Answers3