Re: [Xenomai-help] odd code for loopback option in /src/utils/can/rtcansend.c

[Andrew Tannenbaum <trb@domain.hid>]

Andrew Tannenbaum wrote:

> It looks like the default value for loopback is -1, and if you set it to
> 0 or 1, it turns loopback on, which seems strange. I don't understand
> rt_dev_setsockopt() fully, so I'm not sure if it's a bug - I don't know
> if -1 and 0 and 1 are three separate loopback states, but I think it
> merits attention. I think either the code is wrong or the help string
> and man page are not clear.

Ah, I see what it's doing.  It's changing an existing state, so there 
are three choices:

-1: no change
0: clear
1: set

So the code looks correct.

-Andy