Arch Linux

jimmi61

Member

Registered: 2018-06-02

Posts: 3

[SOLVED] User cannot access VirtualBox shares of Win10 host

I am using VirtualBox 5.2.12. I installed ArchLinux in a VM on a Win10 host and created a share of the folder C:\Users\USER\Documents with the option AutoMount enabled.

When I start the VM I have the share regularly mounted on /media/sf_Documents but accessible only by root.

The user jimmi is in the group vboxsf

$ groups jimmi
power wheel storage vboxsf users

The directory seems to have the proper permits:

sudo ls -ll /media/
totale 96
drwxrwx--- 1 root vboxsf 65536  1 giu 10.31 sf_Documents

root may see the share:

$ sudo df
File system    1K-blocchi     Usati Disponib. Uso% Montato su
dev               2015896         0   2015896   0% /dev
run               2021624       428   2021196   1% /run
/dev/sda1        10255636   3646276   6068688  38% /
tmpfs             2021624     13160   2008464   1% /dev/shm
tmpfs             2021624         0   2021624   0% /sys/fs/cgroup
tmpfs             2021624         8   2021616   1% /tmp
/dev/sda3        10254612     83256   9630736   1% /home
Documents       249576220 155982596  93593624  63% /media/sf_Documents
tmpfs              404324       4    404320   1% /run/user/1000

$ sudo ls -ll /media/sf_Documents
totale 480439
-rwxrwx--- 1 root vboxsf    394937 30 mar  2015  1-1.pdf
...

but the user cannot

$ df
File system    1K-blocchi   Usati Disponib. Uso% Montato su
dev               2015896       0   2015896   0% /dev
run               2021624     428   2021196   1% /run
/dev/sda1        10255636 3646276   6068688  38% /
tmpfs             2021624   24344   1997280   2% /dev/shm
tmpfs             2021624       0   2021624   0% /sys/fs/cgroup
tmpfs             2021624       8   2021616   1% /tmp
/dev/sda3        10254612   83344   9630648   1% /home
tmpfs              404324       4    404320   1% /run/user/1000

$ ls -ll /media/sf_Documents
ls: impossibile accedere a '/media/sf_Documents': Permesso negato

I know that something is wrong with the permits but I cannot figure out what. I read pages and pages of howtos, forums and bug report but did not found anything.

Anybody has a clue of what my problem is?

Thanks in advance
Jimmi

Last edited by jimmi61 (2018-06-04 03:22:58)

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,721

Re: [SOLVED] User cannot access VirtualBox shares of Win10 host

How are you mounting that volume in the guest?

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jimmi61

Member

Registered: 2018-06-02

Posts: 3

Re: [SOLVED] User cannot access VirtualBox shares of Win10 host

How are you mounting that volume in the guest?

I'm not mounting it, I enabled the option AutoMount and it comes mounted by the system on startup.

BTW there are problems mounting shares with the actual kernel as you may read here, but I guess has nothing to do with permits. I downgraded the system to the kernel 4.14 LTS but did not had any effect on my issue.

Last edited by jimmi61 (2018-06-04 02:18:27)

jimmi61

Member

Registered: 2018-06-02

Posts: 3

Re: [SOLVED] User cannot access VirtualBox shares of Win10 host

As I thought the solution was trivial: for some reason the /media directory had permits drwxr-x---, is this standard for Archlinux?

After chmod 755 everything is working like a charm