This file is indexed.

preinst is in slib 3b1-3.1.

This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.

The actual contents of the file can be viewed below.

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#!/bin/sh

set -e

# Older versions of slib stored init files in a separate subdirectory;
# blow that away so that the symlink can be put in its place.

if [ "$1" = "upgrade" -a -d /usr/share/slib/init ]; then
   rm -rf /usr/share/slib/init
fi