rtems_set_errno_and_return_minus_one in driver not returning correct value

[Inderjit Singh]

Thanks Sebastian for you response.

So basically you're saying is that i cannot use errno when using the primitve driver standard driver but use IMFS instead if I want to retain an errno value set in driver and that is recieved by the app.

Regards,
Indy


________________________________________
From: devel [devel-bounces at rtems.org] on behalf of Sebastian Huber [sebastian.huber at embedded-brains.de]
Sent: 11 September 2015 10:18
To: devel at rtems.org
Subject: Re: rtems_set_errno_and_return_minus_one in driver not returning correct value

On 11/09/15 10:10, Inderjit Singh wrote:
> Can I presume that using errno with RTEMS does not work? To me I'm
> baffled that a RTEMS_SUCCESSFULL value must be returned in order to
> retain the errno value.

The standard drivers are quite primitive. You may have a look at IMFS
generic nodes, if you want more control:

https://docs.rtems.org/doxygen/cpukit/html/group__IMFSGenericNodes.html

--
Sebastian Huber, embedded brains GmbH

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