This file is indexed.

prerm is in nis 3.17.1-1build1.

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

case "$1" in
	remove|upgrade|remove-in-favour|deconfigure-in-favour)
		#
		#	Stop the daemons.
		#
		if [ -x /etc/init.d/nis ]; then
			if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
				invoke-rc.d nis stop
			else
				/etc/init.d/nis stop
			fi
		else
			echo WARNING: init script for NIS has been removed - daemons may not be stopped.
		fi

		# /sbin/unix_chkpwd is installed setgid shadow by default; for
		# NIS we need setuid root, so the postinst installed a
		# statoverride.  Remove that override again here.
                if OVR=$(dpkg-statoverride --list /sbin/unix_chkpwd) && \
                   [ "$OVR" = "root root 4755 /sbin/unix_chkpwd" ]; then
			dpkg-statoverride --remove /sbin/unix_chkpwd
			chown root:shadow /sbin/unix_chkpwd
			chmod 2755 /sbin/unix_chkpwd
                fi
		;;
	failed-upgrade)
		;;
	*)
		;;
esac

exit 0