+# upgrade the IMAP server
+upgrade_dovecot() {
+ local local_conf=/etc/dovecot/conf.d/95-${backup_ext}.conf
+
+ if [ -f /etc/dovecot/conf.d/95-local -a ! -f $local_conf ]; then
+ mv /etc/dovecot/conf.d/95-local $local_conf
+ sed -i 's/\/usr\/lib\/dovecot\/modules\/imap/\/usr\/lib\/dovecot\/modules/g' $local_conf
+ /etc/init.d/dovecot restart
+ fi
+
+ if [ ! -f $local_conf ]; then
+ pkgrm dovecot-cn
+
+ # restore config
+ if [ ! -f /etc/dovecot/dovecot.conf.$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 > $local_conf
+ sed -i 's/\/user\/lib\/dovecot\/modules\/imap/\/usr\/lib\/dovecot\/modules/g' $local_conf
+
+ pkgadd dovecot-cn
+ fi
+}
+
+# upgrade bind separately so DNS is not down for too long
+# or breaks postinst scripts of other cn packages that depend on
+# working resolver
+upgrade_bind() {
+ pkgadd bind9-cn
+}
+
+# handle fail2ban upgrade due to error:
+# trying to overwrite '/etc/fail2ban/filter.d/dovecot.conf', which is also in package fail2ban-cn
+upgrade_fail2ban() {
+ if pkg fail2ban-cn && dpkg -L fail2ban-cn | grep -qF dovecot.conf; then
+ pkgrm fail2ban-cn
+ pkgadd fail2ban
+ pkgadd fail2ban-cn
+ fi
+}
+
+# manual upgrade of mailman to avoid two copies of mailman running
+# first started by python upgrade and second started by mailman itself
+upgrade_mailman() {
+ if pkg mailman-cn lt 2:2.1.15~cn0; then
+ /etc/init.d/mailman stop || true
+ pkgadd python
+ pkgadd mailman mailman-cn
+ fi
+}
+
+# manual upgrade of kernel due to new packet name
+upgrade_kernel() {
+ if pkg kernel-2.6-cn; then
+ pkgrm kernel-2.6-cn
+
+ if pkg grub-pc; then
+ pkgadd kernel-cn grub-pc
+ else
+ pkgadd kernel-cn
+ fi
+ fi
+}
+