Hi,

> You must all be getting very exasperated with me. :)

How did you guess this? ;)
It generally happens when one asks silly questions .:)



"man" is your friend (if installed on your linux distro). E.g.

# man recvmsg
I have man but seem to have no entry for recvmsg, recv or recvfrom. I
hope this does not mean the functions will not be available on my
system.....


Then there is the OpenGroups spec:

http://www.opengroup.org/onlinepubs/009695399/

But I thing before diving too deep into this, rather apply the
Chinaman's tactic.
Had a look at it and you know what? I think you are right :(
I will settle for the semi-chinaman technique.....

> No my problem is with the
> rt_dev_ioctl
>
> part. I would like to have a better understanding of the part that
> these functions play.

Add 1 to 1: The CAN profile describes what IOCTLs are available for CAN
sockets. rt_dev_ioctl() (or ioctl() with the POSIX skin) is the way to
pass these IOCTLs down to the CAN stack.

Actually this sheds quite a bit of light on matters. If you would be
so kind as to give a brief explanation of what a "stack" is exactly. I
have been confronted with the term quite a lot now but its not
becoming clearer. I used to think it was a buffer of some kind. Kind
of like the ones that one "pushes" and "pops" on but I can't see a
connection between that concept and what you say above.



I think this should be visible when making one step back, looking at the
whole picture of the documentation pieces and the examples, no?
Absolutely. Thanks.


Regards,

Roland.



>
>> are now even hyperlinked with the API doc (still not 100% perfect yet)
>> e.g.:
>>
>> 
http://www.xenomai.org/documentation/trunk/html/api/rtcanconfig_8c-example.html
>>
>
> And by tremendous chance this was also the code I was studying when I
> posted my email.
>
> Sorry to be such a nuisance. I'll see if I can google for some info on
> rt_dev_ioctl.
>
> Regards,
>
> Roland
>

Jan




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