From mboxrd@z Thu Jan  1 00:00:00 1970
From: Brandt Erickson <berickso@domain.hid>
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Date: Tue, 08 May 2007 15:45:57 -0600
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Subject: Re: [Xenomai-help] rtser not showing up
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> Right now, it appears I can open the file (rt_dev_open returns 0) and
> configure the serial port (using rt_dev_ioctl), however, every call to
> rt_dev_write returns -1.  I'm using the configuration from the example
> code which basically has everything set to defaults.  Is there an
> equivalent of errno I can get to find out what's going wrong?  Thanks.
> -Brandt

Slight modification here, it does write correctly if I call rt_dev_write
from a task spawned by main, but not if I call it from main itself.  So
I guess this is less about rtser per se and more about the rtdm API.