Writing to parallel port

[Malcolm Kay]

On Sat, 26 Jul 2003 03:12, Daan Vreeken [PA4DAN] wrote:
> On Friday 25 July 2003 19:22, Mark wrote:
> > Hello,
> >
> > Has anyone an idea how to set/unset a bit on a parallel port in freebsd
> > 4.7? I installed Device::ParallelPort from CPAN (Perl 5.8.0), but that
> > does nothing (seems made for linux).
> >
> > Or if someone could point me to a little c-source, that would be helpful
> > too; all I need is to toggle a bit to switch a relay.
>
> Have a look at this piece of code if wrote :
> http://vitsch.net/cgi-bin/gpl/cat.cgi/lampd/v1.0?lampd.c
> It's a very small udp network daemon to control my roomlights over the LAN.
>
> Basically you need to open /dev/io to get io read/write permission, after
> that you are free to bang all IO-ports you want.
>

Generally you still need to be root or have root privilege to do this; but 
might vary with different FreeBSD releases.

An alternative that may or may not suit your needs is ppi device access to
parallel ports eg /dev/ppi0; try:
# man ppi

> grtz,
> Daan

Malcolm