Re: [gentoo-user] USB permission/owner - change not allowed as root

[Alan McKinnon]

On 31/12/2013 18:06, Joseph wrote:
> On 12/31/13 10:49, Alan McKinnon wrote:
>> On 30/12/2013 19:22, Joseph wrote:
>>> On 12/30/13 17:36, Randolph Maaßen wrote:
>>> [snip]
>>>>>
>>>>> With the line in fstab:
>>>>>
>>>>> /dev/sdb1               /media/stick    auto
>>>>> noauto,rw,users
>>>>> 0  0
>>>>>
>>>>> Some USB stick are mounted as root:root and I can not change that
>>>>> even as
>>>>> root.
>>>>> When I remove this like from fstab.
>>>>> The USB stick are mounting correctly as joseph:users owner except
>>>>> they have
>>>>> different mounting location which I don't like.
>>>>>
>>>>> --
>>>>> Joseph
>>>>>
>>>>
>>>> You can specify the user/group that mounts a device with some mount
>>>> options. I think they are uid=<username>/gid=<groupname> but I'm not
>>>> sure and unfortunatly not on my Linux box at the moment.
>>>
>>> I've tried in fstab:
>>> /dev/sdb1               /media/stick    auto
>>> noauto,uid=1000,gid=100,umask=077        0  0
>>>
>>> but I'm getting an error:
>>> Error mounting system-managed device /dev/sdb1: Command-line `mount
>>> "/media/stick"' exited with non-zero exit status 32: mount: wrong fs
>>> type, bad option, bad superblock on /dev/sdb1,
>>>
>>> What am I missing?
>>>
>>
>> mount cannot auto-identify the fs type on your USB stick, or /dev/sdb1
>> is the wrong node.
>>
>> blkid as Bruce mentioned will help identify what is really going on.
>> Also, tail -f /var/log/messages, insert the stick, and post the entries
>> that produces.
>>
>>
>>
>>
>> --
>> Alan McKinnon
>> alan.mckinnon@×××××.com
>
> Thank you for the hints, here is the output of: tail -f /var/log/messages
> My line if fstab is: /dev/sdb1        /media/stick    auto
> noauto,rw,user
> and this USB below file are mounted as root:root (not joseph:users)
>
> Dec 31 09:02:16 syscon7 kernel: [231771.029376] usb 8-1: new high-speed
> USB device number 33 using xhci_hcd
> Dec 31 09:02:16 syscon7 kernel: [231771.042189] usb 8-1: default
> language 0x0409
> Dec 31 09:02:16 syscon7 kernel: [231771.043442] usb 8-1: udev 33, busnum
> 8, minor = 928
> Dec 31 09:02:16 syscon7 kernel: [231771.043445] usb 8-1: New USB device
> found, idVendor=058f, idProduct=6366
> Dec 31 09:02:16 syscon7 kernel: [231771.043447] usb 8-1: New USB device
> strings: Mfr=1, Product=2, SerialNumber=3
> Dec 31 09:02:16 syscon7 kernel: [231771.043448] usb 8-1: Product: Mass
> Storage Device
> Dec 31 09:02:16 syscon7 kernel: [231771.043450] usb 8-1: Manufacturer:
> Generic
> Dec 31 09:02:16 syscon7 kernel: [231771.043451] usb 8-1: SerialNumber:
> 058F63666433
> Dec 31 09:02:16 syscon7 kernel: [231771.043515] usb 8-1: usb_probe_device
> Dec 31 09:02:16 syscon7 kernel: [231771.043517] usb 8-1: configuration
> #1 chosen from 1 choice
> Dec 31 09:02:16 syscon7 kernel: [231771.043614] usb 8-1: Successful
> Endpoint Configure command
> Dec 31 09:02:16 syscon7 kernel: [231771.043689] usb 8-1: adding 8-1:1.0
> (config #1, interface 0)
> Dec 31 09:02:16 syscon7 kernel: [231771.043722] usb-storage 8-1:1.0:
> usb_probe_interface
> Dec 31 09:02:16 syscon7 kernel: [231771.043726] usb-storage 8-1:1.0:
> usb_probe_interface - got id
> Dec 31 09:02:16 syscon7 kernel: [231771.043728] usb-storage 8-1:1.0: USB
> Mass Storage device detected
> Dec 31 09:02:16 syscon7 kernel: [231771.043787] scsi41 : usb-storage
> 8-1:1.0
> Dec 31 09:02:17 syscon7 kernel: [231772.175846] scsi 41:0:0:0:
> Direct-Access     Multiple Card  Reader     1.00 PQ: 0 ANSI: 0
> Dec 31 09:02:17 syscon7 kernel: [231772.176055] sd 41:0:0:0: Attached
> scsi generic sg2 type 0
> Dec 31 09:02:18 syscon7 kernel: [231772.836523] sd 41:0:0:0: [sdb]
> 62333952 512-byte logical blocks: (31.9 GB/29.7 GiB)
> Dec 31 09:02:18 syscon7 kernel: [231772.836932] sd 41:0:0:0: [sdb] Write
> Protect is off
> Dec 31 09:02:18 syscon7 kernel: [231772.836934] sd 41:0:0:0: [sdb] Mode
> Sense: 03 00 00 00
> Dec 31 09:02:18 syscon7 kernel: [231772.837316] sd 41:0:0:0: [sdb] No
> Caching mode page present
> Dec 31 09:02:18 syscon7 kernel: [231772.837318] sd 41:0:0:0: [sdb]
> Assuming drive cache: write through
> Dec 31 09:02:18 syscon7 kernel: [231772.838812] sd 41:0:0:0: [sdb] No
> Caching mode page present
> Dec 31 09:02:18 syscon7 kernel: [231772.838815] sd 41:0:0:0: [sdb]
> Assuming drive cache: write through
> Dec 31 09:02:18 syscon7 kernel: [231772.846512]  sdb: sdb1
> Dec 31 09:02:18 syscon7 kernel: [231772.848062] sd 41:0:0:0: [sdb] No
> Caching mode page present
> Dec 31 09:02:18 syscon7 kernel: [231772.848065] sd 41:0:0:0: [sdb]
> Assuming drive cache: write through
> Dec 31 09:02:18 syscon7 kernel: [231772.848067] sd 41:0:0:0: [sdb]
> Attached SCSI removable disk
> Dec 31 09:02:25 syscon7 udisksd[3624]: Mounted /dev/sdb1 (system) at
> /media/stick on behalf of uid 1000
>


That looks normal. Having lines in fstab for removable media is not a
good solution in general - insert two sticks and the second one doesn't
have a matching line (it isn't /dev/sdb1)


That's why automounter apps were developed so you can get the config out
of fstab and replace it with something more generic somewhere else.

udisks is the app you are suing for this and it's the most common
solution chosen by most DEs.

When was udisks last updated on your system?
What was updated/installed at the last update when this problem started?

-- 
Alan McKinnon
alan.mckinnon@×××××.com