Root doesn't work on non-main profile

[ZenerDeveloper]

It appears that the app only works on the main profile. It seems to be able to "see" and create files in others as, if you create a folder, them create the same folder, it will give the file exists error. I tried it in the secure folder (profile 150) and the work profile (profile 13). It can go to sub-directories(The pre-determined ones in the sidebar like Download), but they also don't have files. I feel it worked before the update to android 11, though I can't be certain. I have already tried restarting my phone and both still don't work.

Information about my phone: Samsung Galaxy s10+ (SM-G975U1) Oneui3(android 11) February 1st security patch March 1st Google Play system update(I don't use google play) If you need more information, I will be glad to share it.

[zhanghai]

I think it's likely a limitation on Android 11. Do other file managers work in work profiles?

[ZenerDeveloper]

The samsung file manager works in the work profile, also if I hit add external storage and hit "Use this folder" (In the internal storage) that seems to work properly.

[ZenerDeveloper]

Simple file manager also appears to work properly so I think it could be a bug.

[ZenerDeveloper]

I have done some more testing, it appears to work under the Pixel 4XL api 30 emulator (Both profiles), so it may be exclusive to this device or Samsung phones. I realize that makes it rather difficult to find out what is causing it, and as I can't install the debug apk into the work profile for some unapparent reason, I tried to use logcat with the normal f-Droid release. The output when loading the folder is:

2021-04-02 10:07:21.577 28669-28726/? W/System.err: java8.nio.file.NoSuchFileException: /storage/emulated/13/DCIM: getgrgid: No such file or directory
2021-04-02 10:07:21.577 28669-28726/? W/System.err:     at me.zhanghai.android.files.provider.root.RootablePosixFileAttributeView$a.n(:1)
2021-04-02 10:07:21.577 28669-28726/? W/System.err:     at me.zhanghai.android.files.provider.root.RootablePosixFileAttributeView.m(Unknown Source:4)
2021-04-02 10:07:21.577 28669-28726/? W/System.err:     at me.zhanghai.android.files.provider.root.RootablePosixFileAttributeView.a(Unknown Source:4)
2021-04-02 10:07:21.577 28669-28726/? W/System.err: Caused by: me.zhanghai.android.files.provider.linux.syscall.SyscallException: getgrgid: No such file or directory
2021-04-02 10:07:21.577 28669-28726/? W/System.err:     at me.zhanghai.android.files.provider.linux.syscall.Syscalls.getgrgid(Native Method)

And that repeats for all of the subfolders. It also appears to be exclusive to Material files, as I tried 9 other file managers from f-Droid, and none of them had this issue.

[lamyergeier]

@zhanghai I have same problem with Samsung A70. I can't access Mateiral Files in my Work Profile (although it works in the main profile).

[zhanghai]

This is interesting - didn't expect getgrgid() to fail. Will take a look recently.

[linsui]

Is this fixed? I still can't access /storage/emulated on Android 11.

[zhanghai]

I believe it's fixed in version 1.3.0+, and the app works fine for me in work profile on Android 12.

[linsui]

I'm using 1.3.1 on Android 11 and I can't access /storage/emulated with root access. It gives me a NoSuchFileException error.

[zhanghai]

Oh you are using root. I guess it may be related to mount namespace. If you can build the code on master, the app now uses master mount namespace so maybe this can be fixed.

[zhanghai]

Or you may also try by installing Sui, which is said to always use master mount namespace for the root process.

[linsui]

Oh you are using root. I guess it may be related to mount namespace. If you can build the code on master, the app now uses master mount namespace so maybe this can be fixed.

I get the same error.

[zhanghai]

I tried root access in work profile with Magisk 20.4 on Androdd 9.0. After changing the multi-user setting in Magisk Manager I can see the root request dialog and allow it. I can also observe in the log that the root process is started. However, the app in work profile never received the binder from the root process and timed out waiting for it. Are you observing the same thing?

[zhanghai]

I just confirmed with John and he said libsu indeed missed multi-user support. I've opened an issue for libsu at topjohnwu/libsu#95.

For now if you want root access in work profile, you can instal Sui which properly supports multi-user, and Material Files will switch to Sui if it's available.

[zhanghai]

Re-opening this to track upgrading libsu once John fixes the issue.

[linsui]

I just install Sui and tested again. But I got the same error. I installed MaterialFiles in main profile. I enabled Zygisk and installed Zygisk Sui. MaterialFiles required the root access from Sui. Then I entered the /storage/emulated and got the same error. I also installed it in work profile and got the same error.

[zhanghai]

libsu worked fine for me in primary user and I can access /storage/emulated just fine. I haven't tested Sui though.

[zhanghai]

And what is the exact error you are seeing in your last comment?

[linsui]

I got java8.nio.filr.NoSuchFileException: /storage/emulated: opnedir: No such file or sirectory. I tested libsu and Sui in main user and work user and got the same error.

[RikkaW]

@linsui Tested with Android 12 emulator, Sui + MaterialFiles works fine.

[RikkaW]

@linsui I can reproduce your situation by setting "Root access mode" to "Normal access only".

[linsui]

I tested with root first and root only but got the same error. It's a clean install so every setting is the default one.

[linsui]

I fetched more log. Tested with Sui Zygisk. Maybe it's helpful.

02-23 20:21:50.745 27093 27109 I i.android.file: WaitForGcToComplete blocked RunEmptyCheckpoint on ProfileSaver for 21.783ms
02-23 20:22:31.732 27093 27203 I ShizukuApplication: attachApplication
02-23 20:22:31.709 27093 27093 W me.zhanghai.android.files: type=1400 audit(0.0:24213): avc: denied { read } for comm=4173796E635461736B202336 name="/" dev="sde43" ino=2 scontext=u:r:untrusted_app_29:s0:c139,c256,c512,c768 tcontext=u:object_r:rootfs:s0 tclass=dir permissive=0 app=me.zhanghai.android.files
02-23 20:22:31.769 27093 27093 W me.zhanghai.android.files: type=1400 audit(0.0:24215): avc: denied { getattr } for comm=4173796E635461736B202336 path="/init.recovery.qcom.rc" dev="sde43" ino=27 scontext=u:r:untrusted_app_29:s0:c139,c256,c512,c768 tcontext=u:object_r:rootfs:s0 tclass=file permissive=0 app=me.zhanghai.android.files
02-23 20:22:31.779 27093 27093 W me.zhanghai.android.files: type=1400 audit(0.0:24216): avc: denied { getattr } for comm=4173796E635461736B202336 path="/linkerconfig" dev="tmpfs" ino=12127 scontext=u:r:untrusted_app_29:s0:c139,c256,c512,c768 tcontext=u:object_r:linkerconfig_file:s0 tclass=dir permissive=0 app=me.zhanghai.android.files
02-23 20:22:31.783 27093 27093 W me.zhanghai.android.files: type=1400 audit(0.0:24217): avc: denied { getattr } for comm=4173796E635461736B202336 path="/data_mirror" dev="tmpfs" ino=3250 scontext=u:r:untrusted_app_29:s0:c139,c256,c512,c768 tcontext=u:object_r:mirror_data_file:s0 tclass=dir permissive=0 app=me.zhanghai.android.files
02-23 20:22:40.173 27093 27093 W me.zhanghai.android.files: type=1400 audit(0.0:24224): avc: denied { read } for comm=4173796E635461736B202339 name="/" dev="sde43" ino=2 scontext=u:r:untrusted_app_29:s0:c139,c256,c512,c768 tcontext=u:object_r:rootfs:s0 tclass=dir permissive=0 app=me.zhanghai.android.files
02-23 20:22:40.173 27093 27093 W me.zhanghai.android.files: type=1400 audit(0.0:24225): avc: denied { read } for comm=4173796E635461736B202336 name="/" dev="sde43" ino=2 scontext=u:r:untrusted_app_29:s0:c139,c256,c512,c768 tcontext=u:object_r:rootfs:s0 tclass=dir permissive=0 app=me.zhanghai.android.files
02-23 20:22:40.179 27093 27093 W me.zhanghai.android.files: type=1400 audit(0.0:24226): avc: denied { getattr } for comm=4173796E635461736B202339 path="/init.recovery.qcom.rc" dev="sde43" ino=27 scontext=u:r:untrusted_app_29:s0:c139,c256,c512,c768 tcontext=u:object_r:rootfs:s0 tclass=file permissive=0 app=me.zhanghai.android.files
02-23 20:22:40.186 27093 27093 W me.zhanghai.android.files: type=1400 audit(0.0:24227): avc: denied { getattr } for comm=4173796E635461736B202339 path="/linkerconfig" dev="tmpfs" ino=12127 scontext=u:r:untrusted_app_29:s0:c139,c256,c512,c768 tcontext=u:object_r:linkerconfig_file:s0 tclass=dir permissive=0 app=me.zhanghai.android.files
02-23 20:22:40.189 27093 27093 W me.zhanghai.android.files: type=1400 audit(0.0:24228): avc: denied { getattr } for comm=4173796E635461736B202339 path="/data_mirror" dev="tmpfs" ino=3250 scontext=u:r:untrusted_app_29:s0:c139,c256,c512,c768 tcontext=u:object_r:mirror_data_file:s0 tclass=dir permissive=0 app=me.zhanghai.android.files
02-23 20:22:40.203 27093 27093 W me.zhanghai.android.files: type=1400 audit(0.0:24229): avc: denied { getattr } for comm=4173796E635461736B202339 path="/postinstall" dev="sde43" ino=43 scontext=u:r:untrusted_app_29:s0:c139,c256,c512,c768 tcontext=u:object_r:postinstall_mnt_dir:s0 tclass=dir permissive=0 app=me.zhanghai.android.files
02-23 20:22:40.213 27093 27093 W me.zhanghai.android.files: type=1400 audit(0.0:24230): avc: denied { getattr } for comm=4173796E635461736B202339 path="/init" dev="sde43" ino=25 scontext=u:r:untrusted_app_29:s0:c139,c256,c512,c768 tcontext=u:object_r:init_exec:s0 tclass=lnk_file permissive=0 app=me.zhanghai.android.files
02-23 20:22:40.226 27093 27093 W me.zhanghai.android.files: type=1400 audit(0.0:24231): avc: denied { getattr } for comm=4173796E635461736B202339 path="/init.environ.rc" dev="sde43" ino=26 scontext=u:r:untrusted_app_29:s0:c139,c256,c512,c768 tcontext=u:object_r:rootfs:s0 tclass=file permissive=0 app=me.zhanghai.android.files
02-23 20:22:59.365 27093 27093 W System.err: java8.nio.file.NoSuchFileException: /storage/emulated: opendir: No such file or directory
02-23 20:22:59.371 27093 27093 W System.err: 	at ra.h.s(Unknown Source:46)
02-23 20:22:59.371 27093 27093 W System.err: 	at ua.i$l.q(:1)
02-23 20:22:59.371 27093 27093 W System.err: 	at ua.k.a(Unknown Source:63)
02-23 20:22:59.371 27093 27093 W System.err: 	at ua.i.s(:1)
02-23 20:22:59.371 27093 27093 W System.err: 	at b7.i.e(:2)
02-23 20:22:59.371 27093 27093 W System.err: 	at e9.r0.V(Unknown Source:5)
02-23 20:22:59.371 27093 27093 W System.err: 	at y9.u.call(:1)
02-23 20:22:59.371 27093 27093 W System.err: 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
02-23 20:22:59.371 27093 27093 W System.err: 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
02-23 20:22:59.371 27093 27093 W System.err: 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
02-23 20:22:59.371 27093 27093 W System.err: 	at java.lang.Thread.run(Thread.java:923)
02-23 20:22:59.372 27093 27093 W System.err: Caused by: me.zhanghai.android.files.provider.linux.syscall.SyscallException: opendir: No such file or directory
02-23 20:22:59.372 27093 27093 W System.err: 	at me.zhanghai.android.files.provider.linux.syscall.Syscalls.opendir(Native Method)
02-23 20:22:59.372 27093 27093 W System.err: 	at ra.h.s(Unknown Source:30)
02-23 20:22:59.372 27093 27093 W System.err: 	... 10 more

[zhanghai]

Should have been fixed in v1.4.0 with new version of libsu.

[linsui]

I tested with master and got the same error.

[zhanghai]

That's strange - I can't reproduce it though.

[Shatur]

~I have the same problem with just the default settings. For some reason the app just doesn't ask for file permissions like other apps do. I use Android 12.~ Solved by setting access on "All Files Access" under Apps/Special App Access.