Re: parallel port support in wine

On Thu, 2013-03-28 at 00:39 -0700, Fred wrote:
> Hello,
> 
> I would like to use a logic device programmer that uses the parallel 
> port.  The application software runs well under wine (on Debian 6.0) but 
> it reports it can't find the programmer.  I have a link to the parallel 
> device: .wine/dosdevices/lpt1 -> /dev/lp0.
> 
What are the permissions and group assignments of /dev/lp0? On my Fedora
16 box it is owned by root and is in the lp group and has has no 'world'
access permissions:

crw-rw----  1 root lp       6,   0 Feb 19 16:59 lp0

IOW, if /dev/lp0 has the same ownership and permissions as mine and the
user where you're running the logic device programmer isn't a member of
the lp group your programmer won't be able to access /dev/lp0. You have
two options:

1) add the user to the lp group
2) change the permissions of /dev/lp0 so it has world read 
   and write permissions

I've used option (2) to allow WINE programs to access my serial ports
(/dev/ttyS[0-4] - I have five thanks to a multi-port serial adapter
card), but you can only do this by adding a UDEV rule because modern
kernels use UDEV device handling and this recreated the device files
each time its booted. I added the file /etc/udev/rules.d/99-local.rules
to me system:

============= 99-local.rules =================
#
# Give world read/write access to ttyS* and ttyUSB* serial devices
#
KERNEL=="tty[A-Z]*", GROUP="uucp", MODE="0666"
============= 99-local.rules =================

so this should work for lp0 [caution: untested]

============= 99-local.rules =================
#
# Give world read/write access to lp0
#
KERNEL=="lp0", GROUP="lp", MODE="0666"
============= 99-local.rules =================

Drop the file in place, reboot, and run 'ls -l /dev/lp0' to check that
it had the right effect. If do the programmer should now find the
parallel port.

Martin