Read a per-user mailbox_command from LDAP

scriptsMailboxCommand is currently generated as an operational
attribute using the following CoS template in LDAP:

dn: cn=scriptsMailboxCommandTemplate,ou=People,dc=scripts,dc=mit,dc=edu
cn: scriptsMailboxCommandTemplate
objectClass: top
objectClass: cosTemplate
objectClass: extensibleObject
scriptsmailboxcommand: /usr/bin/procmail -t -p -a "${EXTENSION}" ~/mail_scripts/procmailrc

dn: cn=scriptsMailboxCommandCoS,ou=People,dc=scripts,dc=mit,dc=edu
cn: scriptsMailboxCommandCoS
objectClass: top
objectClass: ldapSubEntry
objectClass: cosSuperDefinition
objectClass: cosPointerDefinition
costemplatedn: cn=scriptsMailboxCommandTemplate,ou=People,dc=scripts,dc=mit,dc=edu
cosAttribute: scriptsMailboxCommand operational-default


Legacy-ID: 2841

Author: andersk

server/fedora/config/etc/postfix/mailbox-command-maps-ldap.cf

@@ -0,0 +1,6 @@
+server_host = ldapi://%2fvar%2frun%2fslapd-scripts.socket/
+search_base = ou=People,dc=scripts,dc=mit,dc=edu
+query_filter = (&(objectClass=posixAccount)(uid=%s))
+result_attribute = scriptsMailboxCommand
+bind = no
+version = 3

server/fedora/config/etc/postfix/main.cf

@@ -12,7 +12,7 @@ myorigin = scripts.mit.edu
 mydestination = scripts.mit.edu, scripts, $myhostname, scripts-test.mit.edu, scripts-test, localhost
 relayhost =
 mynetworks_style = host
-mailbox_command = /usr/bin/procmail -t -p -a "${EXTENSION}" ~/mail_scripts/procmailrc
+mailbox_command_maps = ldap:/etc/postfix/mailbox-command-maps-ldap.cf
 mailbox_size_limit = 0
 message_size_limit = 41943040
 recipient_delimiter = +