Just a random thought ... This is new code in pager.c,
and if Pager->journalOff is at the end of the file,
then perhaps it could cause his problem.
**
** To work around this, if the journal file does appear to
contain
** a valid header following Pager.journalOff, then write a 0x00
** byte to the start of it to prevent it from being recognized.
*/
rc = sqlite3OsRead(pPager.jfd, zMagic, 8, jrnlOff);
--- Noah
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of D. Richard Hipp
Sent: Friday, January 16, 2009 3:30 PM
To: General Discussion of SQLite Database
Subject: Re: [sqlite] reading beyond end of file
Importance: High
On Jan 16, 2009, at 5:38 PM, Dave Toll wrote:
> Hello list
>
>
>
> I recently upgraded from SQLite 3.6.7 to 3.6.10 and I'm now noticing
> some apparently undesirable behaviour. I'm running on an embedded
> system
> with my own VFS implementation, and I see in my tests that SQLite is
> now
> trying to read journal files at an offset beyond the end of the
> file. Is
> anyone aware of any recent changes that could cause this scenario?
> Should this case be handled within the VFS implementation?
>
For testing this, I added an assert() to the unix VFS which will fire
if it ever tries to read past the end of a journal file. Then I ran
our test suite. The assert() never fired. So in our test suite, at
least, SQLite never reads past the end of a a journal file.
I'm curious to know what you are doing to provoke it to read past the
end of a journal file.....
D. Richard Hipp
[email protected]
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