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    SubjectRe: no ioctls for serial ports? [was Re: LANANA: To Pending Device Number Registrants]
    Hi!

    > > Well, if we did something like modify(int fd, char *how), you could do
    > >
    > > modify(0, "nonblock,9600")
    >
    > What you're really proposing is to make ioctl's be ASCII strings.

    Yup.

    > Which is not necessarily a bad idea, and I think plan9 did something
    > similar (or rather, if I remember correctly, plan9 has control streams
    > that were ASCII. Or am I confused?).

    I think that plan9 uses something different -- they have ttyS0 and
    ttyS0ctl. This would leave us with problem "how do I get handle to
    ttyS0ctl when I only have handle to ttyS0"?

    ...

    > However, you can't really use a string. It would really have to be two
    > memory regions: incoming and outgoing, with an ASCII representation being
    > the _preferred_ method for stuff that isn't obviously structured or
    > performance-critical.

    What are cases where it is usefull to pass data back from kernel?
    ...aha, serial controls include possibility to read stuff, right?

    Pavel
    --
    The best software in life is free (not shareware)! Pavel
    GCM d? s-: !g p?:+ au- a--@ w+ v- C++@ UL+++ L++ N++ E++ W--- M- Y- R+
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