[Owncloud] [OwnCloud] ownCloud file permission structure

[Sampath Basnagoda]

Ohhh That's simple. :-)
Thanks a lot Jan.


On Tue, Jun 4, 2013 at 2:55 PM, Jan Brenner <jan at brennerpack.de> wrote:

> **
>
> Hi Sampath,
>
> that's simple. You know the possible permissions and the corresponding
> numeric values. The numeric values are "powers of two".
>
> READ = 2^0
>
> UPDATE = 2^1
>
> CREATE = 2^2
>
> ...
>
> A permission-set is the sum of these values.
>
> Examples:
>
> *When I share a file with both Delete permission and Update permission,
> then value of the permission column is *11*.
>
> --> 8 (DELETE) + 2 (UPDATE) + 1 (READ) = 11
>
> *When I share a file with only share permission (only 'share' check box
> is checked), then value of the permission column is *17*
>
> --> 16 (SHARE) + 1 (READ) = 17
>
> Best
>
> Jan
>
> -----Ursprüngliche Nachricht-----
> *Von:* Sampath Basnagoda <sampathbasnagoda at gmail.com>
> *Gesendet:* Die 4 Juni 2013 10:52
> *An:* owncloud at kde.org
> *Betreff:* Re: [Owncloud] [OwnCloud] ownCloud file permission structure
>
>
> Can Somebody please help me with this?
> Thanks.
>
>
> On Tue, Jun 4, 2013 at 1:22 AM, Sampath Basnagoda <
> sampathbasnagoda at gmail.com> wrote:
>
>> Hi all,
>> I'm developing a new app for ownCloud and I *need to understand existing
>> ownCloud File permission structure* for that.
>> I found that there are following CRUDS file permission constants defined
>> in the code.
>>
>> *const PERMISSION_CREATE = 4;*
>> *const PERMISSION_READ = 1;*
>> *const PERMISSION_UPDATE = 2;*
>> *const PERMISSION_DELETE = 8;*
>> *const PERMISSION_SHARE = 16;*
>> *
>> *
>> *const FORMAT_NONE = -1;*
>> *const FORMAT_STATUSES = -2;*
>> *const FORMAT_SOURCES = -3;*
>>
>> Suppose, I share a file with someone with following different privileges
>> combinations. Then an entry will be added to '*oc_share*' table per each
>> share. There is a column called '*permissions*' in '*oc_share*' table
>> and I can't understand whether how does it get following values for
>> permission column. I mean I can't understand the relationship.
>>
>> *When I share a file with only share permission (only 'share' check box
>> is checked), then value of the permission column is *17*.
>> *When I share a file with only Delete permission (only 'Delete' check
>> box is checked), then value of the permission column is *9*.
>> *When I share a file with only Update permission (only 'Update' check
>> box is checked), then value of the permission column is *3*.
>> *When I share a file with both share permission and Delete permission,
>> then value of the permission column is *25*.
>> *When I share a file with both share permission and Update permission,
>> then value of the permission column is *19*.
>> *When I share a file with both Delete permission and Update permission,
>> then value of the permission column is *11*.
>> *When I share a file with All permissions (Update, Delete, Share), then
>> value of the permission column is *27*.
>> *When I share a file with All permissions (Update, Delete, Share), then
>> value of the permission column is *27*.
>> *When I share a file with none of the permissions, then value of the
>> permission column is *1*.
>>
>> Can somebody please explain me how these values are calculated.
>>
>> Thanks in advanced. Please let me know, if this not clear enough.
>> --
>>
>>
>> *Sampath Basnagoda,*
>> *Undergraduate,*
>> *Department of Computer Science and Engineering,*
>> *University of Moratuwa,*
>> *Sri Lanka. *
>> *
>> *
>> *contacts - (+94)716779281**
>> *
>> *Web Site - sampathbasnagoda.blogspot.com*
>>
>
>
>
> --
>
>
> *Sampath Basnagoda,*
> *Undergraduate,*
> *Department of Computer Science and Engineering,*
> *University of Moratuwa,*
> *Sri Lanka. *
> *
> *
> *contacts - (+94)716779281**
> *
> *Web Site - sampathbasnagoda.blogspot.com*
>
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>
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>
>


-- 


*Sampath Basnagoda,*
*Undergraduate,*
*Department of Computer Science and Engineering,*
*University of Moratuwa,*
*Sri Lanka. *
*
*
*contacts - (+94)716779281**
*
*Web Site - sampathbasnagoda.blogspot.com*
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