This file is indexed.

preinst is in libpam-radius-auth 1.3.17-0ubuntu5.

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 

action=$1
version=$2

if [ "$action" = upgrade ] && dpkg --compare-versions "$version" lt 1.3.16-1.1 && [ `find /etc/pam_radius_auth.conf -printf %m 2> /dev/null` = '644' ]
then
  # check if debconf is missing
  if ! test -f /usr/share/debconf/confmodule
  then
    cat <<EOF
Older versions of libpam-radius-auth installed the /etc/pam_radius_auth.conf
file with incorrect permissions. Should these permissions be corrected? (I
strongly recommend doing this)
EOF
    echo -n "Make /etc/pam_radius_auth.conf readable only by root? [Yn]: "
    read input
    expr "$input" : '[Nn]' >/dev/null || chmod 600 /etc/pam_radius_auth.conf
  else
    # Source debconf library.
    . /usr/share/debconf/confmodule 
    db_version 2.0
    db_get libpam-radius-auth/fixmodes
    if [ "$RET" != "false" ]; then
      chmod 600 /etc/pam_radius_auth.conf
    fi
  fi
fi