[Dovecot] How to notify dovecot that maildir contents is changed by third-party helper ?

[Илья Евсеев]

   Hi, folks!
How to notify dovecot that maildir contents
is changed by third-party helper?

My script performs spam cleanup,
but all index/cache files (dovecot-uidlist, dovecot.index,
dovecot.index.cache and dovecot.index.log) still unchanged,
so, Web-frontend (IlohaMail over IMAP)
displays taht mailbox contents isn't refreshed.

Dovecot 1.0-alpha5 under FreeBSD 4.11.
mail = maildir:/var/vmail/default/%1n/%n

WBR, Ilya

-------------------------------------------------
#!/bin/bash
#
#  CleanupMailboxSpam
#
#  Tracks mail directories of Dovecot IMAP server
#  and moves/removes all messages marked as spam by SpamAssassin:
#
#  * When mailbox contains "KillSpam.<number>" subfolder,
#    all spam messages with score >= <number> are removed.
#  * When mailbox contains "Spam" subfolder,
#    all remaining spam messages are moved to this subfolder.
#  * When mailbox contains "KillSpam" subfolder,
#    all remaining spam messages are removed.
#
#  TODO: update indexes and caches on altered mail folders!!!
#
#  Only for testing: doit=echo; export doit; ...
#  This prints all modification commands instead of executing them.
#
#  Written at Apr 2006 by evseev at sertolovo.ru
#

VMAIL_TOPDIR=/var/vmail
  FIND_DEPTH=4

# Debugging values
VMAIL_TOPDIR=/var/vmail/default/e/evseev
  FIND_DEPTH=1

   INBOX_DIRNAME=cur
KILLSPAM_DIRNAME='.KillSpam'
    SPAM_DIRNAME='.Spam'
      MSGHEADLEN=30

RM="/bin/rm -f"
MV="/bin/mv -f"


#=========  Routines  ==========================================#

IsSpamFile() {
        local msgfile="$1" score2clean="$2"
        local spamstatus=$(head -$MSGHEADLEN "$msgfile" | egrep '^X-Spam-Status: Yes')
        test -z "$spamstatus" && return 1
        if [ -n "$score2clean" ]; then
                local spamscore=${spamstatus##*score=}
                spamscore=${spamscore%%.*}
                test "$spamscore" -lt "$score2clean" && return 1
        fi
        return 0
}

KillSpamInFolder()      #  $1 = kill-label folder to check
{
        local dir2clean=$(dirname $1)/$INBOX_DIRNAME
        local score2clean=$(basename $1)
        score2clean=${score2clean##${KILLSPAM_DIRNAME}.}
        test "$score2clean" -ge 1 -a "$score2clean" -le 50000 > /dev/null 2>&1 || score2clean=
        find "$dir2clean" -type f | while read f; do
                IsSpamFile "$f" "$score2clean" && $doit $RM "$f"
        done
}

MoveSpamToFolder()      #  $1 = spam folder to consume spam
{
        local dir2check=$(dirname $1)/$INBOX_DIRNAME
        find "$dir2check" -type f | while read f; do
                IsSpamFile "$f" && $doit $MV "$f" "${1}/$INBOX_DIRNAME"
        done
}

DoOnSubFolders()        #  $1 = dirmask to find, $2 = action to apply
{
        find $VMAIL_TOPDIR/ -mindepth $FIND_DEPTH -maxdepth $FIND_DEPTH \
                -type d -iname "$1" \
        | while read d; do
                "$2" "$d"
        done
}


#=========  Main  ==============================================#

DoOnSubFolders "${KILLSPAM_DIRNAME}?*" KillSpamInFolder
DoOnSubFolders     "${SPAM_DIRNAME}"   MoveSpamToFolder
DoOnSubFolders "${KILLSPAM_DIRNAME}"   KillSpamInFolder

## EOF ##