Hi Gilles and all
Thanks for ur help.The error i get after replacing printf with
perror("iopl") is "iopl: Operation not permitted".
Please suggest me some solution for this.Thanks again.
Gilles Chanteperdrix <[EMAIL PROTECTED]> wrote: mani bhatti wrote:
> Hi all
> i am trying to access parallel port form a user space task.i have copied
> code from an example which runs parallel port in interrupt mode but the
> problem is that when i run program i get following message
>
> "iopl err"
>
> due to this piece of code
>
> // ask for permission to access the parallel port from user-space
> if (iopl(3)) {
> printf("iopl err\n");
> exit(1);
> }
>
>
> i am working with interrupts for the first time and have no idea why
> this is happening .i am attaching the code also.Thanks all for the great
> help.
What is the error message if you replace printf("iopl err\n") with
perror("iopl") ?
--
Gilles Chanteperdrix
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