RECONSTRUCT(8)               System Manager's Manual              RECONSTRUCT(8)


       reconstruct - reconstruct mailboxes

       reconstruct [ -C config-file ] [ -p partition ] [ -x ] [ -r ] [ -f ]
                   [ -k ] [ -s ] [ -g ] [ -G ] [ -R ] [ -o ] [ -O ] mailbox...
       reconstruct [ -C config-file ] -m

       Reconstruct rebuilds one or more IMAP mailboxes.  When invoked with the
       -m switch, it rebuilds the master mailboxes file.  It can be used to
       recover from almost any sort of data corruption.

       If Reconstruct can find existing header and index files, it attempts to
       preserve any data in them that is not derivable from the message files
       themselves.  The state reconstruct attempts to preserve includes the flag
       names, flag state, and internaldate.  Reconstruct derives all other
       information from the message files.

       Reconstruct reads its configuration options out of the imapd.conf(5) file
       unless specified otherwise by -C.  Any mailbox directory underneath the
       path specified in the partition-news configuration option is assumed to
       be in news format.

       Reconstruct does not adjust the quota usage recorded in any quota root
       files.  After running reconstruct, it is advisable to run quota(8) with
       the -f switch in order to fix the quota root files.

       -C config-file
              Read configuration options from config-file.

       -p partition
              Search for the listed (non-existant) mailboxes on the indicated
              partition.  Create the mailboxes in the database in addition to
              reconstructing them.  (not compatible with the use of wildcards)

       -x     When processing a mailbox which is not in the mailbox list (e.g.
              via the -p or -f options), do not import the metadata from the
              mailbox, instead create it anew (this specifically affects at
              least the mailbox's seen state unique identifier, user flags, and

       -r     Recursively reconstruct all sub-mailboxes of the mailboxes or
              mailbox prefixes given as arguments.

       -f     Examine the filesystem underneath mailbox, adding all directories
              with a cyrus.header found there as new mailboxes.  Useful for
              restoring mailboxes from backups.

       -s     Don't stat underlying files.  This makes reconstruct run faster,
              at the expense of not noticing some issues (like zero byte files
              or size mistmatches).  "reconstruct -s" should be quite fast.

       -n     Don't make any changes.  This gives equivalent behaviour to
              chk_cyrus where problems are reported, but not fixed.

       -G     Force re-parsing of the underlying message (checks GUID
              correctness).  Reconstruct with -G should fix all possible
              individual message issues, including corrupted data files.

       -R     Perform a UID upgrade operation on GUID mismatch files.  Use this
              option if you think your index is corrupted rather than your
              message files, or if all backup attempts have failed and you're
              happy to be served the missing files.

       -U     Use this option if you have corrupt message files in your spool
              and have been unable to restore them from backup.  This will make
              the mailbox IOERROR free and fix replication.  WARNING this
              deletes corrupt message files for ever - so make sure you've
              exhausted other options first!

       -o     Ignore odd files in your mailbox disk directories.  Probably
              useful if you are using some tool which adds additional tracking

       -O     Delete odd files.  This is the opposite of '-o'.

              Rebuild the mailboxes file.  Use whatever data in the existing
              mailboxes file it can scavenge, then scans all partitions listed
              in the imapd.conf(5) file for additional mailboxes.

       You want to reconstruct the index files for a user, you have recovered a
       deleted mail file from backup and given it a suitable name (eg user/ben-
       lacy/33.), but it is not visible since it is not indexed:

       reconstruct -r user.ben-lacy

       If you have the unixhierarchysep:yes option set in /etc/imapd.conf you
       would need to run:

       reconstruct -r user/ben.lacy


CMU                               Project Cyrus                   RECONSTRUCT(8)