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DateSun, 28 Nov 2004 14:07:04 +0100
FromTomas Carnecky <>
SubjectRe: Problem with ioctl command TCGETS
Al Viro wrote:
> On Sun, Nov 28, 2004 at 12:22:03PM +0100, Miklos Szeredi wrote:
> 
>>>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?

And what's the option? So without ioctl, how would you reaplace this:
ioctl(cdrom_fd, CDROMEJECT, 0)?

tom
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