Charles Manning wrote:
> resend because list was down
> On Wednesday 09 September 2009 22:30:28 Voser, Peter wrote:
>> Hi all,
>>
>> When I modify a file, invoke sync and unplug the power of my device, the
>> expected file content has been saved, but the time stamp is still the old
>> one (without fclose invocation).
>>
>> When I do the same with a friendly reboot, the file content is there *and*
>> the time stamp has been updated (still without fclose invocation).
>>
>> I would expect the file stamp to be updated with sync, too.
>>
>> Is this a bug or on purpose?
> 
> Hi Peter
> 
> At present a file system sync just snapshots the file system (ie does a 
> checkpoint) . It does not flush the headers for the individual files. 
> 
> A friendly reboot closes all the files

man sync:

DESCRIPTION
        Force changed blocks to disk, update the super block.

I've never seen that sync closes open files so I see no expectation for 
that but if I'm reading the man page correctly it seems the headers 
should be put out too.

It does not seem to be a case where an individual fs should decide what 
the "desired" functionality is.

best regards.

> 
> Is this a bug? Well I guess it depends on the desired functionality.
> 
> -- CHarles
> 
> 
> 
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