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SubjectRe: Messaging between kernel modules and User Apps
On Thu, 21 Aug 2003, Ihar 'Philips' Filipau wrote:

> Zwane Mwaikambo wrote:
> >>The de facto standard for network devices is to use sockets.
> >>For character and and block devices Unix/Linux uses the
> >>open/poll/ioctl/read mechanisms.
> >
> > That sounds fine, but..
> >
> >>You could send your module a pid via proc and have it send a
> >>signal to your application as a result of an event.
> >
> > ... please don't even entertain such sick ideas.
> Especially when there is fcntl(F_{G,S}ET{OWN,SIG}) infrastructure in
> place - kill_fasync().

Just getting 'even' for the last time I advised poll()/ioctl() and
I was pummeled with "No... use /proc"! Of course the "best" method
is to open a file in the kernel module and have the user poll for
a change in length ->;^;<-)

Dick Johnson
Penguin : Linux version 2.4.20 on an i686 machine (797.90 BogoMips).
Note 96.31% of all statistics are fiction.

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