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/usr/ucb/lookbib database
lookbib uses an inverted index made by indxbib to find sets of bibliographic references. It reads keywords typed after the `>' prompt on the terminal, and retrieves records containing all these keywords. If nothing matches, nothing is returned except another `>' prompt.
It is possible to search multiple databases, as long as they have a common index made by indxbib. In that case, only the first argument given to indxbib is specified to lookbib.
If lookbib does not find the index files (the .i[abc] files), it looks for a reference file with the same name as the argument, without the suffixes. It creates a file with a .ig suffix, suitable for use with fgrep [see grep(1)]. lookbib then uses this fgrep file to find references. This method is simpler to use, but the .ig file is slower to use than the .i[abc] files, and does not allow the use of multiple reference files.