[PARPORT] How parport can perform inp/outp ?

From: DAANEN Vincent (VDAANEN@CHRU-LILLE.FR)
Date: Wed Mar 08 2000 - 05:32:40 EST

  • Next message: Tim Waugh: "Re: [PARPORT] How parport can perform inp/outp ?"

            Hi
    I'm trying to write my own modules to access to a parallel device I did. I
    look in parport source but can't find any reference to ioperm whereas I
    found lots of references to inp, outp. Does using parport needs root
    permissions? If not, why can parport access without ioperm nor iopl ?

    Supposing I create a device /dev/mydevice and loaded mydevice.o module, does
    a simply chmod 666 /dev/mydevice will give me permissions to read and write
    from external world via the parallel port ?

            Thanks for any help

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