December 2002
Intermediate to advanced
1232 pages
56h 38m
English
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Name
NEWDB
Synopsis
The db(3) form of
database uses a single file and can be shared by different
architectures. If you intend to support aliasing in an efficient
manner, you should at least define this NEWDB (or the NDBM described
earlier) in your Build m4
file. The db(3) routines are used to look up
aliases and are the routines used by the User Database (See this section). They can also be used to declare
hash and btree type maps
(Section 23.2.2) with the K
configuration command.
The db(3) libraries have overcome many of the limitations of the earlier ndbm(3) libraries. If possible, you should get and install the db(3) libraries before you build sendmail (see Section 3.1.2 for a guide to downloading these libraries).
If you are running a precompiled sendmail
binary, you can use the -d0.1 debugging
command-line switch (-d0.1) to determine if
NEWDB support is included (if it appears in the list, support is
included).
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.