#!/bin/ksh
#
# Red Hat 6.x Installer for lxrun
#
# Copyright (C) 1999 Steven Ginzburg.
# All rights reserved.
#
# This software is provided "as is" without express or implied warranty.
# 

#
# Changelog:
# ---------
# Oct 27 1999	SG	- Initial Revision (OSR5 only).
# Oct 29 1999	SG	- Adjusted things to work with Solaris.
#			  Added sh-utils, fileutils to PACKAGES list.
# Nov 10 1999	SG	- Clean-ups and fixes suggested by John Polstra.
#			  Added several new PACKAGES.
# Dec 16 1999	RD	- UnixWare 7 port
# Dec 16 1999	JP	- Fixed an inaccuracy in final instructions
# Dec 26 1999	SG	- More minor clean-ups
#
# SG = Steven Ginzburg
# RD = Ranjit Deshpande
# JP = John Polstra

function abort {
	echo $@
	exit 255
}

case `uname -s` in
	SCO_SV)		# OpenServer 5.0.x
		# Default CD-ROM device
		DEFCD=/dev/cd0

		# Libraries required by lxrun
		LXRUN_LIBS="/usr/lib/libc.so.1 /usr/lib/libsocket.so.1 /usr/lib/libnsl.so"

		# mount/umount commands
		MOUNT=/etc/mount
		UMOUNT=/etc/umount

		# Get user ID
		uid=`id -u`

		# Default PATHMAP location
		PATHMAP_DIR=			# root directory of LINUX_ROOT
		PATHMAP_FULL="\$root/PATHMAP"	# full path to PATHMAP
		;;
	UnixWare)	# UnixWare 7.x
		# Default CD-ROM device
		DEFCD=/dev/cdrom/cdrom1
									       
		# Libraries required by lxrun
		LXRUN_LIBS="/usr/lib/libc.so.1 /usr/lib/libsocket.so.1 /usr/lib/libnsl.so"

		# mount/umount commands                                         
		MOUNT="/sbin/mount -F cdfs -r "
		UMOUNT=/sbin/umount
									       
		# Get user ID
		uid=`id -u`

		# Default PATHMAP location
		PATHMAP_DIR=                    # root directory of LINUX_ROOT
		PATHMAP_FULL="\$root/PATHMAP"   # full path to PATHMAP
		;;
	UNIX_SV)	# UnixWare 2.x
		abort "This utility has not been ported to UnixWare 2 yet."
		;;
	SunOS)		# Solaris
		# Default CD-ROM device
		DEFCD=/vol/dev/dsk/c1t0d0/cdrom

		# Libraries required by lxrun
		LXRUN_LIBS="/usr/lib/libmapmalloc.so.1 /usr/lib/libc.so.1 /usr/lib/libnsl.so.1 /usr/lib/libsocket.so.1 /usr/lib/libdl.so.1 /usr/lib/libmp.so.2 /usr/lib/ld.so.1 /usr/lib/libthread.so.1 /usr/lib/librt.so.1 /usr/lib/libaio.so.1 /usr/lib/libmd5.so.1"

		# mount/umount commands
		MOUNT="/usr/sbin/mount -r -F hsfs"
		UMOUNT="/usr/sbin/umount"

		echo "\nWARNING:  You are running Solaris.  Please make sure that vold is disabled.\n"

		# Get user ID
		uid=`id | awk '{ print $1 }' | tr -cd 0-9`

		# Default PATHMAP location
		PATHMAP_DIR=usr/local/lxrun		# Dir relative to $root
		PATHMAP_FULL=/usr/local/lxrun/PATHMAP	# Full path
		;;
	*)
		abort "You are running an unknown system!  Aborting."
		;;
esac

DEFROOT=/lx
TEMP_MNT=/tmp/lx$$
LOG=/tmp/lxlog.$$
RPMINST="--ignoreos --ignorearch --nodeps -i"
PACKAGES="setup filesystem basesystem ld.so ldconfig glibc termcap mktemp libtermcap bash glib libstdc++ info grep XFree86-libs libpng ncurses ncurses3 gtk+ glib10 gtk+10 libjpeg libtiff libgr libungif libghttp libxml gimp-libgimp fileutils sh-utils diffutils textutils gawk rpm Xaw3d libc compat-glibc xpm gdbm sed less tar ed findutils"


# ask "question" var default
function ask {
	echo "\n$1 [$3]? \c"
	read tmp
	if [ "$tmp" = "" ]; then
		tmp=$3
	fi
	eval "$2=\"$tmp\""
}

function doit {
	echo "\t$@"
	eval $@
	tmp=$?
	if [ $tmp != 0 ]; then
		echo "ERROR: Exit value $tmp...ABORTING."
		exit $tmp
	fi
}

function doit_quietly {
	echo \$ $@ >> $LOG
	eval $@ >> $LOG 2>&1
	if [ $? != 0 ]; then
		echo "POSSIBLE ERROR"
	else
		echo "OK"
	fi
}

function create_PATHMAP {
	# /usr/X11R6/lib/X11/locale	/usr/lib/X11/locale
	cat <<! > $1
+				-
/lib				+
/usr				+
/bin				+
/etc				+
/var				+
//var				+
/sbin				+
/opt				+
!
}
	
intr=`stty -a | grep intr | sed -e 's/.*intr = //' | sed -e 's/;.*//'`
cat <<!

This script will install a Linux envinroment for use with lxrun
directly from a Red Hat 6.0 or 6.1 CD.

At any time, you can abort the installation by pressing $intr.

To be able to use this script, you must have:
	- A Red Hat 6 install CD
	- A CD-ROM drive
	- A built copy of lxrun-0.9.5pre1 or later

WARNING:  This script is a beta version!  Your mileage may vary.

!

case $uid in
	0) ;;
	*)	echo "ERROR: This script must be run as root."
		exit 255 ;;
esac

echo "Default values (if applicable) are displayed in [brackets]."
echo "Press ENTER to select the default."


cat <<!

The Linux root is the root directory for the Linux environment we are
about to create.  The directory must not already exist.  The directory
must be on a writeable filesystem with about 75 megabytes of free space.
!
while :
do
	ask "Where would you like your Linux root" root $DEFROOT
	if [ ! -e "$root" ]; then
		break
	fi
	echo "$root already exists."
done
LXRUN="LINUX_ROOT=/ chroot $root /lxrun -P /usr/local/lxrun/PATHMAP"

while :
do
	ask "What is the device node for your CD-ROM drive" cdnode $DEFCD
	if [ -b "$cdnode" ]; then
		break
	fi
	echo "The CD device must be a block special device."
done


deflxrun=`whence lxrun`
if [ -z "$deflxrun" ]; then
	deflxrun=/usr/local/bin/lxrun
fi
while :
do
	ask "What is the full path of your lxrun binary" lxrun $deflxrun
	if [ -x "$lxrun" ]; then
		break
	fi
	echo "'$lxrun' doesn't look right to me.  Try again."
done


echo "\nPlease insert your Red Hat 6 CD in the CD-ROM drive and press ENTER."
read tmp


echo ""
echo "Creating temporary mount point..."
	doit mkdir $TEMP_MNT
echo "Mounting the CD..."
	doit $MOUNT $cdnode $TEMP_MNT
echo "Searching for install image..."
if [ -d $TEMP_MNT/RedHat ]; then
	redhat=RedHat
else
	redhat=.
fi
if [ -d $TEMP_MNT/$redhat/instimage ]; then
	instimage=$TEMP_MNT/$redhat/instimage
else
	abort "ERROR: Can't find directory 'instimage'.  Aborting."
fi
echo "\t[found: $instimage]"
echo "Searching for RPMS directory..."
if [ -d $TEMP_MNT/$redhat/RPMS ]; then
	rpmdir=$redhat/RPMS
else
	abort "ERROR: Can't find directory 'RPMS'.  Aborting."
fi
echo "\t[found: $rpmdir]"
echo "Verifying architecture..."
if [ ! -e $TEMP_MNT/$redhat/i386 ]; then
	abort "ERROR: You need an i386 distribution of Linux.  Aborting."
fi
echo "\t[i386]"
echo "Making the Linux root directory..."
	doit mkdir -p $root
echo "Copying lxrun and things it needs into the install directory..."
	doit cp $lxrun $root
	cp /opt/sfw/lib/lxrun_pathmap /lx/etc/lxrun_pathmap

if [ ! -d $root/usr/lib ]; then
	doit mkdir -p $root/usr/lib
fi
for i in $LXRUN_LIBS
do
	doit cp $i $root/$i
done
echo $PATHMAP_DIR


if [ ! -d $root/$PATHMAP_DIR ]; then
	doit mkdir -p $root/$PATHMAP_DIR
fi
	doit touch $root/$PATHMAP_DIR/PATHMAP
if [ ! -d $root/dev ]; then
	doit mkdir $root/dev
fi
	doit cp -Rp /dev/null /dev/zero $root/dev
echo "Unmounting the CD..."
	doit $UMOUNT $cdnode
echo "Removing temporary mount point..."
	doit rmdir $TEMP_MNT
echo "Setting up environment for installation..."
	doit mkdir -p $root/usr/lib/rpm
	doit touch $root/usr/lib/rpm/rpmrc
	doit mkdir -p $root/var/lib/rpm
	doit mkdir -p $root/var/tmp
	doit mkdir $root/etc
	doit "echo /dev/root / ext2 rw 0 0 > $root/etc/mtab"
	doit mkdir -p $root/usr/X11R6/lib/X11
echo "Creating install mount point under $root..."
	doit mkdir $root/mnt_inst
echo "Remounting the CD under $root..."
	doit $MOUNT $cdnode $root/mnt_inst
RUNRPM="/mnt_inst/$redhat/instimage/usr/bin/rpm"
echo "Initializing rpm database..."
	doit $LXRUN $RUNRPM --initdb
echo "Installing packages..."
for i in $PACKAGES
do
	rpm=`basename $root/mnt_inst/$rpmdir/$i-[0-9]*.rpm`
	echo "\t$rpm...\c"
	if [ ! -r $root/mnt_inst/$rpmdir/$rpm ]; then
		echo "MISSING"
	else
		doit_quietly $LXRUN $RUNRPM $RPMINST /mnt_inst/$rpmdir/$rpm
	fi
done
echo "Unmounting the CD..."
	doit $UMOUNT $cdnode
echo "Cleaning up Linux environment..."
	doit rmdir $root/mnt_inst
	doit rm -rf $root/modules
for i in $LXRUN_LIBS
do
	doit rm -f $root$i
done
	### <HACK> ###
	# $root/usr/lib/libnsl.so was deleted if it was in $LXRUN_LIBS
	# so we must replace it with a link to the Linux libnsl.so.1
if [ ! -e $root/usr/lib/libnsl.so ]; then
	doit ln -s ../../lib/libnsl.so.1 $root/usr/lib/libnsl.so
fi
	### </HACK> ###
	doit rm -f $root/lxrun $root/$PATHMAP_DIR/PATHMAP
echo "Creating PATHMAP file..."
	PATHMAP=`eval echo $PATHMAP_FULL`
if [ -e "$PATHMAP" ]; then
	ask "$PATHMAP already exists.  Overwrite" tmp n
else
	tmp=y
fi
case $tmp in
	y|Y|yes|YES|Yes)
		echo "\t[$PATHMAP]"
		create_PATHMAP $PATHMAP ;;
	*)	
		echo "\t[skipping PATHMAP creation]" ;;
esac
echo "Done!"
cat <<!

The installation is complete.

A log file containing any warnings was written to $LOG.  If all
packages installed "OK" then any warnings in the log may be ignored.

Add one of the following (as appropriate for your shell) to your login
initialization file:

# For Bourne Shell derivatives (sh, ksh, bash, zsh):
LINUX_ROOT=$root
export LINUX_ROOT

    - or -

# For C-Shell derivatives (csh, tcsh):
setenv LINUX_ROOT $root

Then the next time you login, you will be all set to run Linux binaries
with lxrun!
!