Re: reading a opened file

On Sat, 24 Sep 2005 16:38:23 +0100, nowhere@xxxxxxxxxxxxxx wrote:

<snip>

>>Also it is possible that the other App is sensible and closes the file
>>after writes and then reopens it in order to guarantee flushing.

>>We really need to know more about the other App

>It wouldn't need to close the file - just flush the buffers. There
>are functions to do that.

Actually closing and re-opening is a lot safer
- that guarantees that the Directory entry is updated on FAT systems

FlushFileBuffers buffers does not say anything about updating the
directory entry

Under DOS one used to create a duplicate file handle, then close the
duplicate to force a proper (complete) flush.

With sensitive files I pre-extend them substantially, then close them,
that way one is writing to existing parts of the file
- the application programmer then can optionally close and re-open the
file after update(s).

However that is not really relevant, as we do not know how this App is
writing to the file ( and it will be a bit tricky checking that out,
as I'll bet it was not coded by the OP )
.

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