Re: [PATCH] tty: Add EXTPROC support for LINEMODE

[Alan Cox]

> >> For Alpha this value should match OSF if possible.
> 
> OSF didn't define this flag, nor did it assign that particular bit to any 
> purpose. Is that good enough?

Fine

> > Are you suggesting that this is completely unfixable/unworkable? Would it be
> > sufficient to use kernel_termios_to_user_termios() ?

I don't see a way to fix it sanely

> >
> Actually using kernel_termios_to_user_termios_1(). In all supported 
> architectures this structure is basically aligned with but smaller than the 
> userland struct termios.

The relationship isn't quite so simple and it may change in the future,
so this seems to be a very bad idea. Besides which syscalls are *cheap*
so simply notifying someone to reread the terminal data they care about
should be fine. In that sense it seems SVR4 got it right.

Alan
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