sendmail, 4th Edition

Set a Default Database-Map Type for Features

FEATUREs that employ on-disk database files all share the common default database-map type hash. But if you wish to change that default to another type, you can do so with the following mc configuration command:

define(`DATABASE_MAP_TYPE', `dbm')

Here, we declare the default to be dbm, thereby causing all such FEATUREs to use ndbm(3) database files. Note that if you declare a default, you must do so before declaring any database FEATUREs.

Many FEATUREs that take arguments require you to declare the database type. For example:

FEATURE(`authinfo', `dbm /etc/security/authinfo')

That is, this DATABASE_MAP_TYPE’s default is used only if no argument is given for the feature.