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What do the “DEBCONFfooDEBCONF” macros in the Debian configuration do?

April 26, 2017configuration Debian macros

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What do the “DEBCONFfooDEBCONF” macros in the Debian configuration do?

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When the Exim daemon is started, the dpkg-conffiles in /etc/exim4 are post-processed to the result /var/lib/exim4/config.autogenerated, which is the configuration file that Exim reads. In this post-processing step, done by update-exim4.conf, the DEBCONFfooDEBCONF strings are replaced with values pulled from /etc/exim4/update-exim4.conf.conf and system configuration.