dovecot - Oct 2012 - copymail deleted

Hi,

I had enabled an option in dovecot. mail_attachment_dir =
/var/mail/virtual/copymail/attachments

After a while I checked /var/mail/virtual and did some cleanup. I did not
remember that copymail was specified in dovecot and erased it.

Oct 30 10:56:05 mx0 dovecot: imap(hidden): Error:
file_istream.stat(/var/mail/virtual/copymail/attachments/6a/50/6a506530265ef7c9feb396410eaf6946036e9a79-b034401e794009503a0400002cb72ff6)
failed: No such file or directory
Oct 30 10:56:05 mx0 dovecot: imap(hidden): Error: istream-concat: Failed to get
size of stream
/var/mail/virtual/copymail/attachments/6a/50/6a506530265ef7c9feb396410eaf6946036e9a79-b034401e794009503a0400002cb72ff6
Oct 30 10:56:05 mx0 dovecot: imap(hidden): Error: read() failed: Invalid
argument (FETCH for mailbox INBOX UID 196)
Oct 30 10:56:05 mx0 dovecot: imap(hidden): Disconnected: Internal error
occurred. Refer to server log for more information. [2012-10-30 10:56:05] in=150
out=950

I have Bacula and have restored most of the stuff, but obviously not all files.
That is not too important. But I do not know, how to tell dovecot that it may
"forget" about files that produce a "No such file or
directory" error.

Can I do some "rescan/rebuild" in dovecot?

Kind regards

-Christian R??ner

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On 30.10.2012, at 12.11, Christian R??ner wrote:
> Oct 30 10:56:05 mx0 dovecot: imap(hidden): Error:
file_istream.stat(/var/mail/virtual/copymail/attachments/6a/50/6a506530265ef7c9feb396410eaf6946036e9a79-b034401e794009503a0400002cb72ff6)
failed: No such file or directory
> 
> I have Bacula and have restored most of the stuff, but obviously not all
files. That is not too important. But I do not know, how to tell dovecot that it
may "forget" about files that produce a "No such file or
directory" error.
> 
> Can I do some "rescan/rebuild" in dovecot?
Currently you can't in any easy way. The easiest fix for now I think would
be to write a script that reads through dbox files, parses the attachment
metadata lines and recreates the missing files with the original size (e.g.
sparse-0-filled). The dbox parsing can be done easily with:

doveadm dump m.1 | grep ^msg.ext-ref

The format is:

1*(<start offset> <byte count> <options> <ref>)

If the options="-" then the byte count is the final size. If
options="B" then byte count is the base64-encoded size while the
original file has to be base64-decoded size.