This file is indexed.

postinst is in john 1.8.0-2.

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

# Versions earlier than 1.6-34 and later than (perhaps) 1.6-19 include
# /var/run/john as mode 0755, which could allow users to read cracked
# passwords.  Later versions fixed the permissions of the included
# directory, but dpkg doesn't automatically make changes to directory
# modes.
fixperms ()
{
	p=/var/run/john
	# If the admin has an override, don't touch it
	# (even if the override is to mode 0700?)
	if [ -d $p ]; then
		dpkg-statoverride --list $p >/dev/null && return
		curmod=`stat -c %a $p`
		[ $(( 0$curmod & 07077 )) -eq 0 ] && return
		chmod -v 0700 $p
	fi
}

# Commit conffile move from preinst
rm_conffile_do ()
{
	c=0
	# a=1 is a search if the files exist,
	# a=2 is removal of those which do
	for a in 1 2; do
		for f in john-mail.conf john-mail.msg john.ini; do
			g=/etc/$f.moved_by_preinst
			[ -e $g ] || continue
			c=$(( $c + 1 ))
			[ "$a" -eq 1 ] && break
			echo -n " "
			rm -fv $g
		done

		[ "$c" -eq 0 ] && return
		[ "$a" -eq 1 ] || continue
		echo "Committing removal of unmodified conffiles:"
	done >&2
}

case $1 in
configure|abort-upgrade|abort-remove|abort-deconfigure)
	fixperms
	rm_conffile_do

	# this state file has moved to /var/lib/john quite some time ago
	old=/usr/share/john/restore
	new=/var/lib/john/restore

	if [ -e $old ] ; then
		if [ -e $new ] ; then
			rm -f $old
		else
			mv -f $old $new
		fi
	fi
	;;

*)
	echo "$0: undocumented call $@" >&2
	exit 1
	;;
esac