Issue #526: Fix dovecot quota warnings

etc/alternc/templates/dovecot/conf.d/95_alternc.conf

@@ -300,8 +300,8 @@ plugin {
   # Note that % needs to be escaped as %%, otherwise "% " expands to empty.
   #   quota_warning = storage=95%% /usr/local/bin/quota-warning.sh 95
   #   quota_warning2 = storage=80%% /usr/local/bin/quota-warning.sh 80
-     quota_warning = storage=95%% /usr/lib/alternc/quota-warning.sh 95
-     quota_warning2 = storage=80%% /usr/lib/alternc/quota-warning.sh 80
+  quota_warning = storage=95%% quota-warning 95 %u
+  quota_warning2 = storage=80%% quota-warning 80 %u
   #quota = maildir
   quota = dict:user::proxy::quotadict
 
@@ -317,6 +317,15 @@ plugin {
   sieve_dir=~/sieve
 }
 
+service quota-warning {
+  executable = script /usr/lib/alternc/quota-warning.sh
+  unix_listener quota-warning {
+    mode = 0660
+    user = vmail
+    group = vmail
+  }
+}
+
 # Dictionary can be used by some plugins to store key=value lists, such as
 # quota, expire and acl plugins. The dictionary can be used either directly or
 # though a dictionary server. The following dict block maps dictionary names to

src/quota-warning.sh

@@ -1,16 +1,17 @@
 #!/bin/bash
 
-PERCENT=$1
-DOM="`echo $USER | sed -e 's/.*@//'`"
+PERCENT="$1"
+MAILUSER="$2"
+DOM="$(echo "${MAILUSER}" | sed -e 's/.*@//')"
 FROM="postmaster@$DOM"
 
-msg="From: $FROM
-To: $USER
+cat <<EOF | /usr/lib/dovecot/deliver -d "${MAILUSER}" -o "plugin/quota=maildir:User quota:noenforcing"
+From: $FROM
+To: $MAILUSER
 Subject: Your email quota is $PERCENT% full
 Content-Type: text/plain; charset=UTF-8
 
 Your mailbox is now $PERCENT% full."
 
-echo -e "$msg" | /usr/sbin/sendmail -f $FROM "$USER"
-
+EOF
 exit 0