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    SubjectRe: [PATCH] [RFC] notify userspace about time changes
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    On Wed, 2010-08-04 at 15:48 +0300, Alexander Shishkin wrote:
    > Certain userspace applications (like "clock" desktop applets or ntpd) might
    > want to be notified when some other application changes the system time. It
    > might also be important for an application to be able to distinguish between
    > its own and somebody else's time changes.

    So NTP doesn't actually care, as it will notice the STA_UNSYNC flag is
    set the next time it checks adjtimex.

    The clock apps example seems reasonable, but maybe isn't the most
    compelling argument for adding a new kernel api.

    Is there a actual use case that you need this for? I don't really have
    an issue with the code I just really want to make sure the feature would
    be useful enough to justify the API and code maintenance going forward.

    Doing some of my own googling, I see Apple added such a notification
    method, which suggests there are apps that want this.
    http://stackoverflow.com/questions/690326/how-can-i-get-notified-of-a-system-time-change-in-my-cocoa-application

    But it doesn't give any specific examples either.

    thanks
    -john




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