Re: Problem with ioctl command TCGETS

[Pavel Machek]

Hi!

> > > The set-get is supposed to be used for queries, too? The size of value is
> > > only used for the get case to describe the buffer length in that case?
> > > because otherwise the set-get case may require a short value in and a large
> > > answer structure out.
> > 
> > You misunderstand the motivation.  This is to get/set small compact
> > parameters, not huge structures or big data.  Think get/setsockopt().
> 
> Think read(2)/write(2).  We already have several barfbags too many,
> and that includes both ioctl() and setsockopt().  We are stuck with
> them for compatibility reasons, but why the hell would we need yet
> another one?

Passing structure using read/write is evil, because there's nowhere to hook 
32/64 bit translation.
-- 
64 bytes from 195.113.31.123: icmp_seq=28 ttl=51 time=448769.1 ms         

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