#!/bin/bash
set -e

dpkg --assert-support-predepends

if [ "$1" = upgrade ]
then
    if [ -f /var/lib/dpkg/info/timezone.postrm ]; then
	rm -f /var/lib/dpkg/info/timezone.postrm
    fi
    if [ -f /var/lib/dpkg/info/timezones.postrm ]; then
	rm -f /var/lib/dpkg/info/timezones.postrm
    fi
    if dpkg --compare-versions "$2" lt 2.1.3-8; then
	if [ -s /etc/timezone ]; then
	    cp -a /etc/timezone /etc/timezone.save
	fi
    fi
    if dpkg --compare-versions "$2" le 2.2.2-4; then
	# Make upgrades to newer libdb.so.3 easier
	cat /lib/libdb.so.3 > /lib/libdb.so.3.old
    fi
    if dpkg --compare-versions "$2" le 2.1.1-0.1; then
	if [ -f /var/run/utmpd.pid ]; then
	    if kill -TERM `cat /var/run/utmpd.pid` > /dev/null 2>&1
	    then
		if [ -f /var/run/utmp ]; then
		    cp /dev/null /var/run/utmp
		    if grep '^utmp:' /etc/group; then
			chown root.utmp /var/run/utmp
			chmod 664 /var/run/utmp
		    else
			chown root.root /var/run/utmp
			chmod 644 /var/run/utmp
		    fi
		fi
		if [ -f /var/log/wtmp ]; then
		    savelog /var/log/wtmp
		    touch /var/log/wtmp
		    if grep '^utmp:' /etc/group; then
			chown root.utmp /var/log/wtmp
			chmod 664 /var/log/wtmp
		    else
			chown root.root /var/log/wtmp
			chmod 644 /var/log/wtmp
		    fi
		fi
		rm -f /etc/init.d/utmpd
		update-rc.d utmpd remove > /dev/null
	    fi
	fi
	if [ -f /var/run/utmpx ]; then rm -f /var/run/utmpx; fi
	if [ -f /var/log/wtmpx ]; then rm -f /var/log/wtmpx*; fi
	if [ -e /var/run/utmpd.ro ]; then rm -f /var/run/utmpd.ro; fi
	if [ -e /var/run/utmpd.rw ]; then rm -f /var/run/utmpd.rw; fi
    fi
fi

if [ "$1" != abort-upgrade ] && [ "`uname -s`" = Linux ]
then
    # SPARC sun4m requires a recent kernel
    realarch=`uname -m`
    if [ "$realarch" = sparc ]
    then
	cputype=`egrep '^type.*:.*sun4m' /proc/cpuinfo 2> /dev/null` || true
	kernel_ver=`uname -r`

	if [ "$cputype" != "" ]
	then
	    kernel_ver=`uname -r`
	    if dpkg --compare-versions "$kernel_ver" lt 2.2.7
	    then
		echo WARNING: You have a cpu which requires kernel 2.2.7
		echo or greater in order to install this version of libc6.
		echo Please upgrade the kernel before installing this package.
		echo
		echo You should be able to install the latest version of the
		echo sparc kernel-image in order to satisfy this need. You
		echo can also download and compile the latest kernel source
		echo yourself from a kernel mirror \(see http://www.kernel.org/\).
		exit 1
	    fi
	else
	    if dpkg --compare-versions "$kernel_ver" lt 2.2.0 #should be safe
	    then
		echo WARNING: This version of libc6 suggests atleast a
		echo 2.2.0 kernel in order to work properly. 2.0.x kernels
		echo will not be able to support certain functions and
		echo may cause problems. 2.2 kernels have proven to be much
		echo more reliable than 2.0.x kernels on the sparc platform
		echo anyway, so an upgrade is suggested. If you have a 2.1.x
		echo kernel is is suggested you upgrade to the latest 2.2
		echo release, since it is more stable and fixes many bugs.
		exit 1
	    fi
	fi
    fi
fi

exit 0