[wplug] I/O permission

[Henry Umansky]

I'm not exactly sure which device the I/O board is, but I'm sure it's 
somewhere in /dev.  Just change the permissions for that specific board to 
0666 (good old lucky number).  Check 
/usr/src/linux/Documentation/devices.txt for which device it could be.

--On Wednesday, August 06, 2003 9:59 AM -0400 "Weber, Larry A" 
<laweber at switch.com> wrote:r

> I have an I/O mapped (ISA) I/O board in my PC.  In 'C' I can get
> permission to access it as root using:
>
> ioperm (BASEPORT, 8, 1);
>
> and then outb (......
>
> (BASEPORT is 0x300, there are no conflicts.)
>
> When I run as a user the ioperm function denies access.  I believe I need
> to change the permissions of the I/O port, as I do for program access to
> the serial and parallel ports.  Any idea how to change permissions on a
> group of I/O port addresses?
>
> -laweber
>
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Henry Umansky
University of Pittsburgh
Computing Services and Systems Development
hmust2 [at] pitt [dot] edu
(412) 624 -4357