Re-UID each mail

Bron Gondwana brong at
Sun Sep 14 01:47:35 EDT 2014

On Sun, Sep 14, 2014, at 07:23 AM, Florent Peterschmitt wrote:
> Hi,
> I'm getting into something a little too tricky for me (== don't have
> time to investigate enough) : I want to modify cyrus.index files to
> change UIDs of all messages in a mailbox.

You can't just do that unless you rename the message files as well.

> For now, I have a tiny python script that can change any header value,
> but where I'm stuck is for any other header which value depends of others.
> Like all CRC ones, for example.

Yep, they are an extra level of trickyness for sure.

> For now, I tested by sending two mails. So their UID are 1 and 2.
> After the script, 1 is 2 and 2 is 3.
> I've mv each mail to get the correct name.

Ahh, OK.  That helps.  It's really not ideal to do this though, so I wonder why
you are even trying?

> But now (I knew it would not be so easy), no mail (0 exists, 0 recent).

I wouldn't be surprised to see IO errors in the logs too.  We're not as diligent
at checking the error codes from parsing index records as we could be
everywhere in the code - many of the read paths just skip invalid records,
hence the zero exists.

I have a perl module that does roughly what you are doing there, and it
can even re-calculate the CRCs...

Or you can just look in mailbox.c at mailbox_index_record_to_buf and friends
in the Cyrus source code.



  Bron Gondwana
  brong at
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