September 2000
Intermediate to advanced
624 pages
14h 32m
English
Content preview from Advanced UNIX ProgrammingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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The NDBM Database
Before you design your application program around a NDBM database, you need to answer the following questions:
Will readers and writer(s) need access at the same time?
How many writers will there be at one time?
Having multiple readers is not a problem when there is no write activity occurring. However, the NDBM routines do not provide any protection against readers and writers in conflict. For example, one process might delete a key that conflicts with another process that is visiting all the keys in the database. Additionally, these routines do not permit multiple writers to the database at one time. Despite these limitations, the NDBM routines still find many uses in standalone and single-user solutions.
Error Handling
With ...
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