>On Wed, 28 May 2003, John M Collins wrote:
>
>
>>If I invoke mmap to map a file to memory, and it succeeds, can I safely
>>close the original file descriptor and rely on the memory still being
>>mapped and the file still updated (possibly with mysnc)?
>>
>>
>
>Yes, that's definitely a part of the specification of mmap,
>even if it's not mentioned on the man page.
>
>Note that the file on disk is likely not to be updated until
>some time after you unmap it, unless you use msync to force it.
>
Thanks - FYI the file mod time eventually got updated on HP-UX but not
on Solaris (2.9) or Linux (2.4.21) - and it doesn't seem to update it
even if you don't close the f.d. I think that has to be wrong if the
manual page is anything to go by.
-- John Collins Xi Software Ltd www.xisl.com
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