Hi,
On Tue, 2005-03-22 at 03:51, Andrew Morton wrote:
> The spec says "Write I/O operations on the file descriptor shall complete
> as defined by synchronized I/O file integrity completion".
>
> Is ftruncate a "write I/O operation"? No.
SUS seems to be pretty clear on this. The syscall descriptions for
write(2) and pwrite(2) explicitly describe O_SYNC as requiring
synchronized I/O file integrity completion. ftruncate() has no such
requirement.
It would certainly be a reasonable thing to do, but I don't think it
strictly counts as a bug that we're not honouring O_SYNC here.
--Stephen
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