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    SubjectRe: /proc/<pid>/maps API addition - seek to address
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    Jeremy Fitzhardinge wrote:
    > It would be terribly useful to have some way of
    > lseeking /proc/<pid>/maps to the entry of a particular address. So, if
    > you want to find the information about a mapping containing address
    > 0x12345678, it would set the file position to (say) the entry of
    > 0x12000000-0x20000000.
    >
    > I haven't looked at how /proc/<pid>/maps is implemented these days; is
    > this outright hard, or relatively straightforward? This wouldn't be
    > very useful if it had to actually generate all the output up to the
    > desired point, but it would be a boon if it could short-circuit that. I
    > guess the interactions with normal lseek might be tricky (but perhaps
    > that could be put off until you actually use lseek, if ever).
    >

    I'm fairly certain you can just return that the seek is done, and set
    flags for the file descriptor, then on read() have it return the data
    you want it to.


    > Alternatively, any other API for finding the properties of page X would
    > be useful, but this seemed like a nice incremental extension of the
    > existing interface.
    >
    > J
    >
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