This file is indexed.

preinst is in libc6-dev-x32 2.19-18+deb8u10.

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.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
#!/bin/sh

set -e

case $1 in
	(upgrade|install)
	# We want /usr/include/sys to be a normal directory instead
	# of a symlink
	if test -h /usr/include/sys ; then
		rm -f /usr/include/sys
	fi
	;;
	(*)
	;;
esac