Hi!
This is from my talk with Alexander...
Pavel
----- Forwarded message from Alexander Viro <[EMAIL PROTECTED]> -----
X-Authentication-Warning: albert.math.psu.edu: viro owned process doing -bs
To: Pavel Machek <[EMAIL PROTECTED]>
cc: Richard Gooch <[EMAIL PROTECTED]>, Manuel Estrada <[EMAIL PROTECTED]>,
linux-kernel development list <[EMAIL PROTECTED]>
Subject: Re: Suggested dual human/binary interface for proc/devfs
On Fri, 7 Apr 2000, Pavel Machek wrote:
> Hi!
>
> > > Binary interfaces are the natural interface for programmes. ASCII
> > > interfaces are the natural interface for humans. We need to support
> > > both.
> >
> > OK, tell me when was the last time when you've used a lot of
> > ioctl()s in your code. How often were they called? Examples,
> > please.
>
> [You wanted example, here you are].
>
> Take a look how usbdevfs is done. AFAICS, it is build on ioctls
> [example from usbd/example]:
So we have a recently-added braindead interface. Wow.
> static int usb_control_msg(int fd, u_int8_t requesttype, u_int8_t
> request, u_int16_t value,
> u_int16_t index, unsigned int size, void
> *data)
> {
> struct usb_proc_ctrltransfer ctrl;
>
> ctrl.requesttype = requesttype;
> ctrl.request = request;
> ctrl.value = value;
> ctrl.index = index;
> ctrl.length = size;
> ctrl.data = data;
> return ioctl(fd, USB_PROC_CONTROL, &ctrl);
> }
>
> Communication with usb device will be mostly done with stuff like
> that...
Too bad - that's actually an example of people _not_ understanding UNIX.
Heck, since they got a filesystem to play with, why not create file such
that writing there would give the effect of monster above?
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