#!/bin/sh
# pre install script for the Debian GNU/Linux modutils package

set -e

# Check if we are upgrading while running a 2.0 kernel. If so abort
# immediately since we don't support those kernels anymore.
if [ "$1" = "upgrade" ] && dpkg --compare-versions "`uname -r`" lt 2.2.0 ; then
	cat <<EOF
ERROR: you are running a pre-2.2.0 kernel on this machine. Recent
versions of modutils no longer support those kernels.
EOF
	
	if [ ! -f /proc/modules ] ; then
		cat <<EOF
However, your kernel does not seem to use modules, so I will upgrade
anyway.
EOF
	else
		echo To prevent breaking this system the modutils upgrade will abort.
		exit 1
	fi
fi


# Remove diversions if we are upgrading from a version that still
# diverted linux/kerneld.h
if [ "$1" = "upgrade" ]; then
	if dpkg --compare-versions "$2" lt 2.3.5-1 ; then
		dpkg-divert --package modutils --remove \
				--divert /usr/include/linux/kerneld.h.libc6 \
					/usr/include/linux/kerneld.h
	fi

# Don't forget to mention the config-file format changed on us again!
	if grep -q '^path' /etc/conf.modules 2>/dev/null ; then
		cat <<EOF
WARNING: the configuration format for modutils has changed!

Your modutils configuration contains path statements. Since version 2.3.1
of modutils the syntax for this statement has changed. The section is
no longer automatically appended to the given path. To demonstrate: if
you have a statement like this:

  path[fs]=/lib/modules/`uname -r`

it should be replaced with this statement:

  path[fs]=/lib/modules/`uname -r`/fs

For more documentation on the syntax please see the modules.conf manpage.

Please press [ENTER] to continue
EOF
		read HITME
	fi
fi

# maybe an old kerneld is still running?
if [ -f /sbin/kerneld ]; then
	start-stop-daemon --stop --quiet --oknodo --exec /sbin/kerneld
fi

# Handle namechage from conf.modules to modules.conf
if [ -f /etc/conf.modules ]; then
	if [ -f /etc/modules.conf ]; then
		echo "The modutils configurationfile /etc/conf.modules has been"
		echo "renamed to /etc/modules.conf. I tried to rename the file,"
		echo "but there is already a file called modules.conf present."
		echo "You will have to resolve this situation manually."
	else
		mv /etc/conf.modules /etc/modules.conf
	fi
fi

# Check for symlinked /etc/modules.conf and replace it by a real file
if [ -f /etc/modules.conf -a -L /etc/modules.conf ]; then
	echo "Your /etc/modules.conf is a symlink. I will replace this by"
	echo "a real file so update-modules can do it's work later."
	cp /etc/modules.conf /etc/modules.conf.DPKG-UPGRADE
	cat /etc/modules.conf.DPKG-UPGRADE > /etc/modules.conf
	rm /etc/modules.conf.DPKG-UPGRADE
fi

# Remove any architecture-specifics in /etc/modutils. This is safe since
# we already copied the used file (see above).
echo -n "Removing obsoleted files: "
for i in conf.generic conf.i386 conf.m68k conf.m68k.amiga conf.m68k.atari \
		conf.m68k.amiga conf.m68k.mac ; do
	if [ -f /etc/modutils/$i ]; then
		echo -n "$i "
		rm -f /etc/modutils/$i
	fi
done
echo

# We had a bug in 2.4.10-2 that left a stray /etc/chandev.conf. file,
# remove that.
if [ -e /etc/chandev.conf. ] ; then
	rm -f /etc/chandev.conf.
fi

exit 0