Databases

Contents:
Support in Makefile
Aliasing
The ~/.forward file
:include: Files and Mailing Lists
The makemap Program
The K Command
Classes
Databases in Rules
The User Database
Hints

Database support in sendmail includes external files, internal symbol tables, and database-style hooks into processes. Databases support the common aliases and such m4 style features as mailertable and the User Database.

Support in Makefile

Some database support is always supplied as a part of sendmail (like dequote), while others require you to include support inside your Makefile when building sendmail. Support is added on the DBMDEF= line:

DBMDEF= -DNDBM

This line adds support for ndbm(3) database files (see §18.4.1). Some database formats, such as db, may require that you also add include file and library support:

INCDIRS=-I/usr/local/include/db LIBS= -ldb -lresolv

Here LIBS= had -ldb added (see §18.4.6), and INCDIR= show the path to the db include files (see §18.4.3).

• -DHESIOD
• Supports hesiod(3) for aliases only (see §18.8.10).
• -DLDAPMAP
• Supports ldap(3) white pages (see §18.8.15).
• -DNDBM
• Supports ndbm(3) database files (see §18.8.24).
• -DNEWDB
• Supports the Berkeley db(3) database (see §18.8.28).
• -DNIS
• Supports Sun's nis network services (see §18.8.29).
• -DNISPLUS
• Supports Sun's nisplus network services (see §18.8.30).
• -DNETINFO
• Supports NeXT's netinfo(3) (see §18.8.27).