Questions tagged [file-permissions]

Use this tag if your issue is with permissions in the file system (files & directories). For app permissions, use the 'permissions' tag instead.

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11 views

Securely storing keyfiles with authentication and alike

I am using Keepass as my password manager. I am using a keyfile for securing access to my database. However when I want to do the same on my android phone I have to store the keyfile in my phone ...
2
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1answer
119 views

Why root cannot access “.android_secure” directory on external SD card?

I have an Android 9 tablet, rooted by way of Magisk. It has an external SD card mounted as sdfat on /mnt/media_rw/1234-5678 which is mounted on four other mount points, all as type sdcardfs, with some ...
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1answer
238 views

How to access /storage/emulated/10 (multi-users env) in adb shell on Android 9+ without root access?

I have two Android system users configured. $ pm list users Users: UserInfo{0:Owner:13} running UserInfo{10:security space:13} running UserInfo{999:XSpace:800010} running When the mobile ...
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51 views

Why `diag_mdlog` not able to write on `/sdcard` if it is fired from an Android App that has write permissions?

I am getting a weird behavior with diag_mdlog executable. I am executing it from my Android app as su -c /vendor/bin/diag_mdlog -o /sdcard/abc -f /sdcard/Test.cfg The issue is: if the android ...
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0answers
30 views

File showing on device not showing on computer

I'm developing an Android application where some data is exported in a json file written in the Download folder. My objective is to get this file from a computer (when the device is USB connected). ...
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1answer
58 views

Can a System-App read the data of other apps on Android 9?

I want to know if a system-app is able to read the data of other apps (the data stored in /data/data.) on Android 9. Thanks!
1
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1answer
720 views

How to edit root files in /sys (Permission Denied)?

I have been trying to change root files in my phone through an app I am developing. The phone I have is a Moto G6, fully rooted. I'm using terminal emulators to run commands on my phone. I've tried "...
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1answer
316 views

Termux files permission

I have an issue with files permission in termux. For instance I installed c4droid and copied the termux include and lib folders content in the c4droid folder where the headers are being looked for at ...
0
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1answer
170 views

Can android user become a super user in android?

Is it possible to change the rights of normal user in android to super user? My requirement is to run the super user code(I want to read a file data from system directory) in a device that has ...
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0answers
83 views

How to make new files in Downloads folder visible to all apps?

In Android Nougat, when I use Samsung's File Manager to move an apk file into the Downloads folder, it then appears - within File Manager - in the Downloads folder (as expected). When I try to access ...
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45 views

Permission denied on android directories?

Forgive my newness... I've installed Android Studio/Android SDK in Windows 7, enabled debugging on my Droid Turbo 2 with Android 7.0, system version 25.216.2.kinzie_verizon.verizon.en.US, and ...
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1answer
818 views

Unable to modify file permissions.xml, get error Read-only file system

I have a rooted Galaxy S5 SM-G900V, lineage_klte, ARMv7 Processor rev 1 (v71), Kernel: 3.4.113-lineageos #1 SMP, Oreo 8.1 that a friend asked me to modify. I need to modify the platform.xml file to ...
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1answer
1k views

Why is the '/storage/emulated/' directory inaccessible?

The /storage directory and the /storage/emulated/0 directory is accessible in a non-rooted Android OS. So, why is the /storage/emulated directory not accessible in a non-rooted Android OS ?
4
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2answers
6k views

Is it possible to change file permissions on Android's internal storage?

How can I change file permission of a file on Android without rooting? I actually want to prevent some files from deletion. Note: I am asking of changing the file permissions of user-created files in ...
2
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1answer
1k views

SimpleSSHD - create reusable user/password?

I have downloaded SimpleSSHD (aka Dropbear) to access my Android via SSH. I am able to do so with the one-time password, but I'm trying to write a Python script that can access the phone. Is there a ...
1
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1answer
44 views

Why do I have to get permission to save to my own phone?

I am the owner of a new Samsung Galaxy J7 (J700T). When I try to delete files with no data on them on my internal, external, or SD card, the phone tells me I am denied. I want the files I've created....
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1answer
1k views

How to change the modified date of a file without root?

How do I change the modified date of a file, specifically PNGs, on Android without root? Total Commander failed to do it with a permission error Access Denied.
1
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1answer
156 views

Exclude an Android/data folder from cache cleanup

I have a game which downloads all of it's data and contents in a folder in Android/data . The size is over 400MB and device is not rooted. Every time I do a cache and junk cleanup, All files of this ...
3
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1answer
843 views

Why do write attempts to /system/priv-app cause /system to switch to read-only?

I'm trying to write files to the /system/priv-app directory. I boot into recovery (TWRP) and run adb shell. ~ # mount /system ~ # mount rootfs on / type rootfs (rw,seclabel) ... /dev/block/mmcblkXXXX ...
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0answers
5k views

Package installation in Termux

I'm reading this guide that describes how to install the statistical language R on Termux. My installation journey is briefly outlined below. I need to determine why nothing happens at Step #2 ...
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0answers
359 views

SD card write permission issues after restoring from backup to an identical phone model

I've been using LineageOS 14.1 on a rooted unlocked Samsung S7 (G930F) for a long time. My phone started dying, so I rebooted to TWRP and managed to take a full backup to the SD card before it died. ...
1
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1answer
4k views

Can't create new folders on SD card?

I'm using Lenovo A7000 with Lollipop and I can't create new folders on SD Card. Attempt to create folder on SD card always end with error, however, android phone is not going to tell me what error it ...
0
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1answer
163 views

How to make root-created files accessible to normal users?

My device is running Android 8.0, rooted using Magisk as the su manager. I log into it using SimpleSSHD. I'm trying to do some actions which require root access, and in the process I'm creating some ...
2
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0answers
64 views

Data recover/transfer from a disk image

Situation. I have a .img disk image file obtained from a .vmdk file via a virtualbox conversion, the latter being created by an Android 4.4.2 emulator. I'm trying to recover some app data and transfer ...
3
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1answer
1k views

How to remount sdcardfs to allow setting file permisions / ownerships?

I have a rooted OnePlus One running LineageOS 15.1 (Oreo 8.1). I am trying to adjust some file permissions/ownerships on the emulated sdcard partition. The partition seems to be mounted as an ...
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0answers
272 views

Running commands operating on files always results in permission denied errors

When I try executing commands operating on files, they always fail. I can't check permissions on the terminal because I'd have to run a command that operates on a file (directory) in order to do so. ...
3
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0answers
1k views

Play store apps cannot write to external SD Card in Android Oreo

My Galaxy S7 edge recently updated to Oreo. Now play store apps no longer have rights to write to my external SD card. I have followed app instructions about how to open a system folder chooser dialog,...
2
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1answer
151 views

Unable to copy files from one /data/data/ directory to another (Root)

I'm trying to copy one file from /data/data/com.application1/myfile to /data/data/com.application2/myfile The file arrives with owner and group set to the app that it came from. I then changed the ...
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0answers
153 views

What file system for Asus Zenfone 2 on CentOS 6.9?

I'm trying to mount my Android Asus Zenfone 2 on CentOS 6.9. I created a folder in /mnt/android as the mounting point. I edited the /etc/fstab file in the following way because somewhere in some ...
2
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0answers
1k views

SSHDroid cannot write sd card

The title says it all. Running android 7.1 not rooted device, I am running sshDroid on android device, ssh into it from my laptop. When I ssh into the device and check the permissions for the SD ...
1
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1answer
705 views

Create shared folder on sdcard

Is there any way to create a directory on an external sdcard that has read/write access for multiple apps. For example I want to us synththing or rsync under termux be able to sync this directory to ...
0
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1answer
70 views

Portable storage: do I have to re-grant app permissions when switching microSD cards?

I'm using a Moto Z2 Force running Android 7.1.1 with a 128 GB microSD card installed. I wanna upgrade to a 400 GB card. Would I have to re-grant microSD access app permissions for the new card, or do ...
3
votes
1answer
2k views

Unknown file type containing a virus

I will try to keep the story as short as possible just so you can have a more clear view of what is my concern. While, I was browsing the Internet on my phone using the Chrome Browser App, I got a ...
0
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1answer
350 views

Docx document is read-only in LibreOffice

I created a docx file in LibreOffice on my computer running Debian 9.1 with KDE and copied it to my Android phone. On the phone I try to open the file with the LibreOffice app. However I can't edit ...
0
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1answer
241 views

host file in android

I have a rooted device. I would like to protect my hosts file from being deleted, maybe with a password or something like that. Is this possible?
0
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1answer
821 views

Cannot paste files into System/Media

I am looking to change my boot audio but cannot change it due it not copying from my computer to my phone but I can copy from the device to my computer. I have the latest version of Android Studio / ...
0
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0answers
327 views

Why can't my phone write to external USB drive?

I bought a new 3TB USB3.0 external harddisk for storing and transferring large files (mainly hd movies from my camera) between my Android phone (Galaxy S7 edge) and my PC (Win10). Using windows, I... ...
0
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2answers
930 views

How to use an ext4 formatted sd card as external storage with working app permissions?

I'm using LineageOS14.1 (Android 7.1.2) on a Moto G 3rd gen I'm using a 64GB sd and my phone technically doesn't support it, it worked fine until I put more stuff on it and then it started to ...
1
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1answer
2k views

wpa_supplicant.conf permission

So I'm facing this problem for a while now . What happens is that my phone reboots automatically sometimes and after the reboot I can't use my WiFi . The button is stuck at off: So after doing some ...
2
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2answers
2k views

Copying files from PC to “external” SD card

I've got AirDroid and SSHDroid installed on a ZTE Axon 7 running 7.1.1. The phone has a micro SD card in it, and it can access (read from) that card successfully. What I can't do is copy files onto it....
2
votes
1answer
535 views

System Set Permissions Accidentally, and is Corrupt

My phone's system folder at /system was corrupt. I accidentally set its permissions to rw-r--r--. Then, I reboot my phone, and nothing is working. Here's what I mean: 1st reboot: power off; 2nd ...
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0answers
3k views

Permission denied reading /dev/block/mmcblk0p4 as root

I will list my main objective first, dependencies after. If there is a better path to my goal, please show me the way.... I want to install Lollipop on my HTC One S. (Or a later version, if one is ...
5
votes
2answers
15k views

What file systems can I use for a 128GB sdcard on Android 7.1, used as portable storage

I can't find an answer to this on StackExchange. I have a phone running beta LineageOS 14.1 (Android 7.1), and a 128GB SDXC card which I want to use as portable/shared storage between devices. I ...
0
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2answers
96 views

What is actually happening on the rom when I rooting android device? What is happen on rooting? [duplicate]

What is actually happening on rooting? Is it change file system, or modify file or add new files or add new configirations....etc? I know the meaning of rooting but I want to know how it dowing.
1
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2answers
6k views

Can't change file and folder permissions on rooted device

I can't change the file and folder permissions on my rooted android 4.4.2 device. I tried doing this from Root Explorer, Total Commander and also from terminal emulator and it didn't worked. Any idea ...
0
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0answers
40 views

Why file permissions work in unexpected manner? And what makes it possible

My app doesn't have storage permissions, yet I can read/write files in /data/user/0/com.myapp/files . When on emulator connected as root I can push a file to this directory, but then the app cannot ...
0
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0answers
41 views

Secure access to a file

In an android phone, generally we use App Locker or other applications for securing applications. Like App Locker, how to restrict media files (images and video)? I don’t want to hide them. I would ...
1
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0answers
681 views

Understanding android partitions and directories permissions

I'm playing with mount points, directories and files permissions on a rooted MotoG1 using adb (a model without SDCard Slot), and I've come into certain behaviours I can't really understand. Connected ...
2
votes
1answer
2k views

How to allow read/write access in a specific folder on the SD Card with Android 6.0.1?

I like to move my AnkiDroid storage to the SD-Card, because my Anki-Decks get huge, in terms of filesize, and my internal storage is full. Anyways (seemingly because they did not like to took the ...
0
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0answers
59 views

Manage file access for apps (Linux user accounts/groups)

I recently realized that Xprivacy is not capable of restricting the file storage access. So now I'm looking for a reliable way to do that. I guess denying the general storage permission would ...