On Fri, Jan 09, 2004 at 10:26:32AM -0500, Herbert Graf wrote:
> > On Thu, 8 Jan 2004, Herbert Graf wrote:
> > > I have a script on a linux machine that runs a program that accesses the
> > > parallel port. It seems that I can only access the port as
> > root. The problem
> > > is I'd like to run the script as apache (in the cgi-bin).
> > >
> > > I've tried setuid but that fails. Anyone know how I might open
> > up hardware
> > > access to user apache? Or how to get apache to run the script AS root?
> >
> > Can't you chown the parallel port device? "chown apache:apache /dev/lp0"
> > or something?
>
>         It's acessing the port directly. Thanks, TTYL

To clarify, it's using the ioperm call to facilitate access. This mechanism
doesn't use the driver associated with /dev/lpX, so the permissions on that
port. Take a read here for more details:

http://www.tldp.org/HOWTO/IO-Port-Programming-2.html

BAJ

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