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All the Perl that's Practical to Extract and Report

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  • # MBM had the idea of using a filter log file for lsearch lookups.
    logfile $home/.msgid.log
    if ${lookup{$h_message-id:}lsearch{$home/.msgid.log}} is "seen"
        save $home/inbox
        logwrite "$h_message-id: seen"
    • I had been thinking that something structured like this might work. But lsearch will be O(n), won't it? And if most message IDs aren't repeated, then most searches will be for the whole file. Whereas using a DBM file would be O(1), wouldn't it? But would require writing a custom program to insert seen message IDs into the DBM file, which is a fork hit.

      • You can write a persistent program to look after the database and use ${readsocket. Or link your Exim with perl and use ${perl :-)