kpathsea: Filename database
5.5 Filename database ('ls-R')
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Kpathsea goes to some lengths to minimize disk accesses for searches
(⇒Subdirectory expansion). Nevertheless, in practice searching
every possible directory in typical TeX installations takes an
excessively long time.
Therefore, Kpathsea can use an externally-built "filename database"
file named 'ls-R' that maps files to directories, thus avoiding the need
to exhaustively search the disk.
A second database file 'aliases' allows you to give additional names
to the files listed in 'ls-R'.
The 'ls-R' and 'aliases' features are implemented in the source file
'kpathsea/db.c'.
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