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

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NAME

       reconstruct - reconstruct mailboxes

SYNOPSIS

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

DESCRIPTION

       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  under-
       neath 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.

OPTIONS

       -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
	      ACL).

       -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 mes-
	      sage 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  mes-
	      sage 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 files.

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

       -m     NOTE: CURRENTLY UNAVAILABLE
	      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.

EXAMPLES

       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

FILES

       /etc/imapd.conf

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