+# upgrade the IMAP server
+upgrade_dovecot() {
+ if [ ! -f /etc/dovecot/conf.d/95-local ]; then
+ pkgrm dovecot-cn
+
+ # restore config
+ if [ ! -f /etc/dovecot/dovecot.conf.$backup_ext ]; then
+ mv /etc/dovecot/dovecot.conf /etc/dovecot/dovecot.conf.$backup_ext
+ cp /usr/share/dovecot/dovecot.conf /etc/dovecot/dovecot.conf
+ fi
+
+ # copy SSL certificates
+ OLD_SSL_CERT="/etc/ssl/certs/dovecot.pem"
+ OLD_SSL_KEY="/etc/ssl/private/dovecot.pem"
+ SSL_CERT="/etc/dovecot/dovecot.pem"
+ SSL_KEY="/etc/dovecot/private/dovecot.pem"
+ if [ -f $OLD_SSL_CERT -a -f $OLD_SSL_KEY -a ! -f $SSL_CERT -a ! -f $SSL_KEY ]; then
+ if [ ! -e /etc/dovecot/private ]; then
+ install -d -o root -g root -m0700 /etc/dovecot/private
+ fi
+
+ cp -av $OLD_SSL_CERT $SSL_CERT
+ cp -av $OLD_SSL_KEY $SSL_KEY
+
+ chown root:dovecot $SSL_CERT
+ chmod 0644 $SSL_CERT
+ chown root:dovecot $SSL_KEY
+ chmod 0600 $SSL_KEY
+ fi
+
+ # install new version and restore local changes
+ pkgadd dovecot-core
+ doveconf -n -c /etc/dovecot/dovecot.conf.$backup_ext > /etc/dovecot/conf.d/95-local
+
+ pkgadd dovecot-cn
+ fi
+}
+