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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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