On 01/04/2011 16:19, Paul Alfille wrote:
> Ok, the /structure directory returns a small text file for each
> possible property
> e.g. owserver --fake=10
> owread /structure/10/temperature
> t,000000,000001,ro,000012,
[ lots of very useful info ]
> The fourth field is the read/write mode
> oo,wo,ro,rw
what is the oo mode ? no access at all ? It is used ?
> Does this expose all the data you need?
yes, but the 'immuable' property : both 'temperature' and 'id' have
the 'ro' mode for 28* chips.
The idea would be to let know software using owfs that it can read this value
only once and then catch it.
So, my 'request' is nearly void. The only 'missing' thing (in addition to
the immuable information) for now is that I need to make two directory reads
to see the difference between plain and system files. But, as there is
catching, it is not a big deal.
Regards,
Vincent
> Paul Alfille
>
> On Fri, Apr 1, 2011 at 9:07 AM, Roberto Spadim <robe...@spadim.com.br> wrote:
>> check ownet.php there's something about it too, it check not only one
>> file, but have a cache about file informations (types)
>> the information about files must be compatible with FUSE must check
>> fuse docs and see what can be done
>>
>> 2011/4/1 Paul Alfille <paul.alfi...@gmail.com>:
>>> Have you looked at the "structure" entries? Does it give you the
>>> information you need? Otherwise, I think your idea has merit. This
>>> information could be included in every owserver response (with a bump
>>> in protocol number and preserving backwards compatibility).
>>>
>>> Paul Alfille
>>>
>>> On Fri, Apr 1, 2011 at 6:07 AM, Vincent Danjean <vdanjean.p...@free.fr>
>>> wrote:
>>>> Hi,
>>>>
>>>> I would like to propose a new command for owserver. Currently, when
>>>> we want to list directories, several commands are available, at least
>>>> DIR and DIRALLSLASH. Moreover, we can use flags in the command to
>>>> add (or not) to the listing system files.
>>>> If a software want automatically scan a directory and know which
>>>> kind of files are present, it needs at least two invocations of
>>>> DIRALLSLASH to discove the properties of directory entries (system or
>>>> not, directory or file). And some other properties are known by
>>>> owfs but cannot be discovered by software. I mean:
>>>> - is the file readable ?
>>>> - is the file writable ?
>>>> - can the file contents change ? (never for the 'type' property for
>>>> example)
>>>> - what is the type of the data ? (float, int, string)
>>>> - ...
>>>>
>>>> I can think of this kind of flags:
>>>> r: readable
>>>> w: writable
>>>> d: directory (R/W does not apply ?)
>>>> i: immuable (contents never changes)
>>>> s: system file
>>>> ti: contents is always an integer
>>>> tf: contents is always a double
>>>> ts: contents is a string
>>>> l: this file is a link (ie alias)
>>>>
>>>> The format of the answer can be problematic if all POSIX filename are
>>>> allowed for aliases and if we want a ASCII answer. A possible format would
>>>> be for each entry:
>>>> flags1 flags2 ... name:X [link:Y]
>>>> filename1
>>>> [filename2...]
>>>> where flagsX are previous flags (boolean properties)
>>>> and name:X, link:Y, ... are properties with argument that will follow
>>>> in the next X, Y lines.
>>>> In my example, there will nearly always be name:1 (name of the file
>>>> on one line, ie without "\n" in the name of the file)
>>>> And link:Y would be present for aliases (generally, Y would be 1
>>>> unless there is "\n" in the target of the alias)
>>>>
>>>> What do you think of this ?
>>>> And is the info (immuable, format, ...) already exported by drivers ?
>>>>
>>>> This command can be extended over time to give more info if needed
>>>> (client should ignore unknown attributes, or the request can include
>>>> before the path the list of attributes we are interested in)
>>>>
>>>> Regards,
>>>> Vincent
>>>>
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>>>
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>>>
>>
>>
>>
>> --
>> Roberto Spadim
>> Spadim Technology / SPAEmpresarial
>>
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>
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--
Vincent Danjean Adresse: Laboratoire d'Informatique de Grenoble
Téléphone: +33 4 76 61 20 11 ENSIMAG - antenne de Montbonnot
Fax: +33 4 76 61 20 99 ZIRST 51, avenue Jean Kuntzmann
Email: vincent.danj...@imag.fr 38330 Montbonnot Saint Martin
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