[lug] Strange Kernel IO habits

[Ferdinand Schmid]

HI,
We have recently developed a little application that collects data from 
a number of wireless sensors through a receiver.  The receiver is 
connected to a linux box, where the data packets are being processed.

Here is our observation:
We configured the serial port (e.g. ttyS0) to raw input and appropriate 
speed, etc.

Despite this setting, which in our opinion should provide "raw input" = 
unprocessed input, we still experienced some processing, at least with 
kernels 2.2.14, and 2.2.16: 

The system did its Carriage Return - Newline conversion    (icrnl bit 
set), causing us a lot of headache since we didn't suspect such a 
thing.  Turning the icrnl bit off fixed the problem.  But shouldn't raw 
input mean no conversions?

Am I missing something here and this behavior makes sense or should this 
be considered a bug?

Ferdinand

-- 
Ferdinand Schmid
http://www.archenergy.com
303-444-4149 x231