On 14/06/18 18:53, RobH wrote:
> On 14/06/18 18:39, RobH wrote:
>> On 14/06/18 17:59, Dennis Lee Bieber wrote:
>>> On Thu, 14 Jun 2018 15:59:29 +0100, RobH 
>>> declaimed the
>>> following:
>>>
>>>> On 14/06/18 13:23, Dennis Lee Bieber wrote:
>>>>> On Thu, 14 Jun 2018 12:04:01 +0100, RobH 
>>>>> declaimed the
>>>>> following:
>>>>>
>>>>>> pi@raspberrypi:/mnt $ sudo chown -R 777 /mnt/CCTV
>>>>>
>>>>>     Unless you have a user named "777" those parameters are wrong.
>>>>> http://www.linfo.org/chown.html
>>>>> """
>>>>>    The basic syntax for using chown to change owners is
>>>>>
>>>>>       chown [options] new_owner object(s)
>>>>> """
>>>>>
>>>>>
>>>>>> drwxr-xr-x 3 777 root 4096 Jun  5 09:50 CCTV
>>>>>                 ^^^ ^^^^
>>>>>
>>>>> ^^^ user name
>>>>> ^^^^ group name
>>>>>
>>>>>     Try
>>>>>
>>>>> chown -R pi /mnt/CCTV
>>>>>
>>>>>     Or (untried) create a new group (call it NASuser), chown the
mount
>>>>> point to that group, and then add pi user to the new group.
>>>>>
>>>>>
>>>>>     That 777 looks like you are trying to set permission levels
>>>>> (the rwx
>>>>> stuff you see on the left). That command is chmod
>>>>>
https://www.linode.com/docs/tools-reference/tools/modify-file-permissions-with-
chmod/
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>> I have changed 777 to 775.
>>>>
>>>> The reason I used it was because I didn't want any problems with no
>>>> permissions either writing the file to my NAS box and viewing the file
>>>> as a user
>>>>
>>>> chown -R pi /mnt/CCTV
>>>> returns this:
>>>>
>>>> chown: changing ownership of '/mnt/CCTV/PiZero/dht.cpp': Operation not
>>>> permitted
>>>> chown: changing ownership of
>>>> '/mnt/CCTV/PiZero/2018-06-14_10.12.34.h264': Operation not permitted
>>>> chown: changing ownership of
>>>> '/mnt/CCTV/PiZero/2018-050-23_17.m%.19.h264': Operation not permitted
>>>>
>>>> I used sudo chmod without any errors.
>>>
>>>     If you had used "chmod" without "sudo" you'd have had the same
error
>>>
>>>     All "sudo" prefix does is say "execute the following command using
>>> "root" privileges... I presumed you'd realize that changing ownership
>>> would
>>> require those elevated privileges and would use the sudo prefix; I
>>> merely
>>> suggested the proper syntax for the "chown" part.
>>>
>>>>
>>>> Using this eample, does the group have to be named, as in g= name of
>>>> group??
>>>>
>>>> chmod -R +w,g=rw,o-rw, ~/group-project-files/
>>>
>>>     Look at the output of "ls -l", it will tell you the owner, and the
>>> group, that a file belongs to. If the user is a member of the group, it
>>> will have the group privileges.
>>>
>>>     What the above command did is: add write (modify) privilege --
>>> likely
>>> for the owner (who already had it), set group member access to
>>> read/write,
>>> and change "other" access to remove read/write (no access at all
>>> unless the
>>> files had eXecute privilege for "other".
>>>
>>>     Even before you get a book on Linux basics, try to learn how to
read
>>> the result of
>>>
>>> man command-of-interest
>>>
>>> (though you may have to install the man pages; I don't recall if RPi
>>> installs those by default)
>>>
>>>
>>
>> Ok, I'll have a look at that.
>>
>> Anyways, this is what I have tried so far
>>
>> pi@raspberrypi:~ $ chown -R pi /mnt
>> pi@raspberrypi:~ $ chown -R pi /mnt/CCTV
>> pi@raspberrypi:~ $ chown -R pi /mnt/CCTV/PiZero
>>
>> pi@raspberrypi:~ $ cd Downloads
>> pi@raspberrypi:~/Downloads $ python intruder.py
>> Traceback (most recent call last):
>>    File "intruder.py", line 37, in 
>>      shutil.copyfile(RAMname, NASname)
>>    File "/usr/lib/python2.7/shutil.py", line 83, in copyfile
>>      with open(dst, 'wb') as fdst:
>> IOError: [Errno 13] Permission denied:
>> '/mnt/CCTV/PiZero/2018-06-14_17.35.31.h264'
>>
>> pi@raspberrypi:~ $ chown -R pi:pi /mnt/CCTV/PiZero
>> chown: changing ownership of
>> '/mnt/CCTV/PiZero/2018-06-14_17.35.31.h264': Operation not permitted
>>
>>
>>
>> pi@raspberrypi:~ $ sudo chmod -R pi=pi /mnt
>> chmod: invalid mode: ‘pi=pi’
>> Try 'chmod --help' for more information.
>>
>>
>> I have been googling this permissions problem and have tried what you
>> see from what others have said.
>>
>> The main problem I have is no matter what I try or do, the permissions
>> do not change for the /mnt directory. This is owner and group of root.
>>
>> The other child folder permissons are owned  by pi, and group pi, so
>> unless I can get the permissions changed for /mnt, Ill never get my
>> project finished.
>>
>
> The 0 byte files are being produced by the python script and have been
> copied from the piZero over to my NAS box, and have 5 files from today's
> efforts
>

I changed the owner and group of /mnt to pi:pi, then checked in Pi's gui
file mangler, but /mnt was till owned by root.

Then tried:

pi@raspberrypi:/mnt $ ls -l
total 4
drwxrwxrwx 3 pi pi 4096 Jun  5 09:50 CCTV


So I then tried:

pi@raspberrypi:~/Downloads $ python intruder.py
Traceback (most recent call last):
   File "intruder.py", line 37, in 
     shutil.copyfile(RAMname, NASname)
   File "/usr/lib/python2.7/shutil.py", line 83, in copyfile
     with open(dst, 'wb') as fdst:
IOError: [Errno 13] Permission denied:
'/mnt/CCTV/PiZero/2018-06-14_19.52.39.h264'

Changing user and group made no difference

Looking in the pi's gui file mangler again shows that root is still the
owner of /mnt
All the child folders are owned by pi:pi (user:group)

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