problems mounting camera to download pics ....

[Andrew Gould]

On Thu, Feb 26, 2015 at 2:23 PM, William A. Mahaffey III <wam at hiwaay.net>
wrote:

> On 02/26/15 12:09, Polytropon wrote:
>
>> On Thu, 26 Feb 2015 12:04:15 -0600, William A. Mahaffey III wrote:
>>
>>> On 02/26/15 11:39, Polytropon wrote:
>>>
>>>> On Thu, 26 Feb 2015 11:38:48 -0600, William A. Mahaffey III wrote:
>>>>
>>>>> .... I am trying to mount my digital camera to download some pics I
>>>>> just
>>>>> took. When I do this as root, it works AOK & I got the pics off.
>>>>> However, when I changed my fstab file to (supposedly) allow regular
>>>>> users to mount that directory, the mount command fails:
>>>>>
>>>>>
>>>>> [wam at kabini1, ~, 11:33:11am] 530 % mount /media/flash/
>>>>> mount_msdosfs: /dev/da0s1: Operation not permitted
>>>>> [wam at kabini1, ~, 11:35:58am] 530 %
>>>>>
>>>> And with "sudo" prefix? :-)
>>>>
>>> [wam at kabini1, ~, 11:58:22am] 568 % mount /media/flash/
>>> mount_msdosfs: /dev/da0s1: Operation not permitted
>>> [wam at kabini1, ~, 11:58:25am] 569 % sudo mount /media/flash/
>>> mount_msdosfs: /dev/da0s1: mount option <users> is unknown: Invalid
>>> argument
>>> [wam at kabini1, ~, 11:58:27am] 570 %
>>>
>> I didn't find the "users" option in "man mount" or "man mount_msdosfs",
>> what is it supposed to do? What if you temporarily remove it?
>>
>
> A linuxism :-/ .... makes no difference either way, other than the parsing
> error .... It's supposed to allow regular users to mount that resource ....
>
>
>>
>>  relevant lines from my fstab file:
>>>>>
>>>>>
>>>>> /dev/da0s1      /media/flash            msdosfs
>>>>> rw,sync,noauto,longnames,-Lru_RU.UTF-8,users    0       0
>>>>>
>>>> Suggestion regarding msdosfs: add "-m=644,-M=755" to the
>>>> options to get rid of the fake +x attributes for the files.
>>>> You could also add "noatime".
>>>>
>>> Roger, wilco ....
>>>
>> Not essential to solve the problem, but might be helpful for
>> further usage.
>>
>>
>>
>>  Not a huge issue, since I can get 'er done as root, but I don't see why
>>>>> this shouldn't be feasible as a regular user .... TIA & have a nice,
>>>>> snowy (here) day ;-) ....
>>>>>
>>>> Do you have the mandatory "vfs.usermount=1" in /etc/sysctl.conf?
>>>> Also check the device permissions: User or group requires rw for
>>>> the device and must own the mountpoint.
>>>>
>>> .... & remember to change it in the command line as well, done, still
>>> the same problem .... my root dir:
>>>
>>>
>>> [wam at kabini1, ~, 12:01:36pm] 570 % ll /
>>> total 32890
>>> [...]
>>> drwxr-xr-x   5 root  wheel          512 Oct 26 08:01 media/
>>> [...]
>>> So am I supposed to have /media group writable ? I did so & same issue
>>> ....
>>>
>> I think so. You can test this by temporarily chown'ing the
>> whole /media subtree to your user, and then run the command
>> as user (given that vfs.usermount is already set).
>>
>> You can find more info here (regarding user mount):
>>
>> https://www.freebsd.org/doc/handbook/usb-disks.html
>>
>>
> Hmmmm .... this looks rather involved, I think I'll punt. I can get stuff
> mounted by root, & I usually have a root window open, so I'm OK as is.
> Thanks :-) ....
>
> --
>
>         William A. Mahaffey III
>
>  ----------------------------------------------------------------------
>
>
If you set the suid on mount and umount, users should be able to mount and
unmount devices.

     chmod u+s /sbin/*mount


Andrew