Re: Simple Xenomai 4 API use examples and a question

[Philippe Gerum <rpm@xenomai.org>]

Philippe Gerum <rpm@xenomai.org> writes:

> Emmanuel Pacaud <emmanuel.pacaud@lapp.in2p3.fr> writes:
>
>> [1. text/markdown]
>> Hi,
>>
>> I have started to work on a repository which is intended as a
>> collection of very simple (dumb) examples of Xenomai 4 API use. Each
>> example is an application, sometimes coupled with a kernel module,
>> with the strict minimum around the actual API use. Applications and
>> kernel modules are built using meson. The meson files are also kept
>> the their simplest form. That was easy for the application building,
>> not so for the kernel modules.
>>
>> The repository is here: <https://gitlab.com/emmanuelpacaud/xenomai-c-examples>
>>
>> It is similar to what I did for my own project: <https://github.com/AravisProject/aravis-c-examples>. I do think this sort a simple example collection are useful to understand how to use an API.
>>
>> It is a work on progress, the code should be more commented.
>>
>> But to be useful, all the examples should work, and I'm blocking on the oob_ioctl example :(
>>
>> * <https://gitlab.com/emmanuelpacaud/xenomai-c-examples/-/blob/cd9f849d4325b57565edcd691021255adc486b90/oob-ioctl.c>
>> * <https://gitlab.com/emmanuelpacaud/xenomai-c-examples/-/blob/cd9f849d4325b57565edcd691021255adc486b90/modules/oob-ioctl.c>
>> * <https://gitlab.com/emmanuelpacaud/xenomai-c-examples/-/blob/cd9f849d4325b57565edcd691021255adc486b90/modules/oob-ioctl.h>
>>
>> The ioctl call fails with a `Bad file descriptor` error. What I'm doing wrong ?
>>
>
> Looks like a typo in the public path to the thread:
>
> - fd = open ("/dev/oob_ioctl", O_RDWR);
> + fd = open ("/dev/evl/thread/oob_ioctl", O_RDWR);

Sorry, stike that. I missed the point. You want to open the driver, not
the thread element.

-- 
Philippe.