postgres/contrib/mac/README.mac

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This directory contains tools to create a mapping table from MAC
addresses (e.g., Ethernet hardware addresses) to human-readable
manufacturer strings. The `createoui' script builds the table
structure, `updateoui' obtains the current official mapping table
from the web site of the IEEE, converts it, and stores it in the
database, `dropoui' removes everything. Use the --help option to
get more usage information from the respective script. All three
use the psql program; any extra arguments will be passed to psql.