#!/bin/bash

# This is the file containing the filesystem.  You probably shouldn't change
# it since the kernel has this name hard-wired.
FSFILE=root_fs

# Increase this if you add more stuff and 100 Meg isn't enough.
FSMEGS=100

# This is a temporary mount point which will be used to mount the new
# filesystem while it's being built.
MNTDIR=mnt

# Change these if your distribution is located someplace else
CDDIR=/mnt/cdrom
RPMDIR=$CDDIR/RedHat/RPMS

# These are to get bash off the ground.  You probably shouldn't change them.
BASH_RPMS="filesystem- ldconfig- glibc- libtermcap- bash-"

# These are all the others.  Add new rpms to this list if you want more stuff
# in your filesystem.
REST="bdflush- fileutils- grep- mingetty- mount- net-tools- textutils- \
    shadow-utils- chkconfig- procps- sed- mktemp- vixie-cron- modutils- \
    e2fsprogs- logrotate- sysklogd- console-tools- gawk- initscripts- quota- \
    slang- pwdb- cracklib- cracklib-dicts- compat-glibc- glib- pam- \
    sh-utils- util-linux- SysVinit- tcp_wrappers- tcsh- gdbm- perl-5.00503- \
    netkit-base- telnet- ftp- wu-ftpd- indexhtml- zlib- lynx- findutils-"

function rpm_file()
{
    local name=$1
    set $RPMDIR/$1[-0-9.i]*.rpm
    if [ $# -ne 1 ]
    then
	echo
	echo Found too many rpms for $name 2>&1
    elif [ ! -f $1 ]
    then
	echo
	echo Found no rpms for $name 2>&1
    fi
    echo $1
}

echo Creating an empty file...
dd if=/dev/zero of=$FSFILE bs=$((1024 * 1024)) count=$FSMEGS || exit 1

echo Making a file system in it...
sudo mke2fs -F $FSFILE || exit 1

echo Mounting it on $MNTDIR
sudo mount -o loop $FSFILE $MNTDIR || exit 1
cd $MNTDIR

sudo mkdir -p var/lib/rpm/ || exit 1
sudo mkdir -p var/tmp/ || exit 1

echo Forcibly installing the rpms that bash needs

for rpm in $BASH_RPMS
do
    rpm_file=`rpm_file $rpm`
    echo Installing $rpm_file
    sudo rpm -i --nodeps --root `pwd` $rpm_file
done

echo Bash should now work

sudo rpm -i --root `pwd` `rpm_file setup-`

echo -n Making devices...
sudo mkdir dev
echo -n "pts "
sudo mkdir dev/pts
echo -n "null "
sudo mknod dev/null c 1 3
echo -n "console "
sudo mknod dev/console c 5 1
echo -n "fhd0 "
sudo mknod dev/fhd0 b 62 0
echo -n "tty0 "
sudo mknod dev/tty0 c 4 0
echo -n "cua0 "
sudo mknod dev/cua0 c 5 64
echo -n "ptmx "
sudo mknod dev/ptmx c 5 2
sudo chmod 666 dev/ptmx
echo ptys
for i in 0 1 2 3 4 5 6 7 8 9
do
    sudo mknod dev/ptyp$i c 2 $i
    sudo mknod dev/ttyp$i c 3 $i
    sudo chmod 666 dev/ptyp$i dev/ttyp$i
done

echo Installing a couple of rpms for info
sudo rpm -i --root `pwd` `rpm_file info-` `rpm_file ncurses-`

echo Here are all the rest
for rpm in $REST
do
    file=`rpm_file $rpm`
    echo $file
    sudo rpm -i --root `pwd` $file
done

echo Setting up /etc/inittab
sudo bash -c 'cat > etc/inittab' <<EOF
#
# inittab       This file describes how the INIT process should set up
#               the system in a certain run-level.
#
# Author:       Miquel van Smoorenburg, <miquels@drinkel.nl.mugnet.org>
#               Modified for RHS Linux by Marc Ewing and Donnie Barnes
#

# Default runlevel. The runlevels used by RHS are:
#   0 - halt (Do NOT set initdefault to this)
#   1 - Single user mode
#   2 - Multiuser, without NFS (The same as 3, if you do not have networking)
#   3 - Full multiuser mode
#   4 - unused
#   5 - X11
#   6 - reboot (Do NOT set initdefault to this)
# 
id:3:initdefault:

# System initialization.
si::sysinit:/etc/rc.d/rc.sysinit

l0:0:wait:/etc/rc.d/rc 0
l1:1:wait:/etc/rc.d/rc 1
l2:2:wait:/etc/rc.d/rc 2
l3:3:wait:/etc/rc.d/rc 3
l4:4:wait:/etc/rc.d/rc 4
l5:5:wait:/etc/rc.d/rc 5
l6:6:wait:/etc/rc.d/rc 6

# Things to run in every runlevel.
ud::once:/sbin/update

# Trap CTRL-ALT-DELETE
ca::ctrlaltdel:/sbin/shutdown -t3 -r now

# When our UPS tells us power has failed, assume we have a few minutes
# of power left.  Schedule a shutdown for 2 minutes from now.
# This does, of course, assume you have powerd installed and your
# UPS connected and working correctly.  
pf::powerfail:/sbin/shutdown -f -h +2 "Power Failure; System Shutting Down"

# If power was restored before the shutdown kicked in, cancel it.
pr:12345:powerokwait:/sbin/shutdown -c "Power Restored; Shutdown Cancelled"


# Run gettys in standard runlevels
0:2345:respawn:/sbin/mingetty tty0
c:2345:respawn:/sbin/mingetty cua0

# Run xdm in runlevel 5
# xdm is now a separate service
x:5:respawn:/etc/X11/prefdm -nodaemon
EOF

echo Setting up /etc/passwd
sudo bash -c 'cat > etc/passwd' <<EOF
root::0:0:root:/root:/bin/bash
user::1:1:user:/home/user:/bin/bash
EOF

echo Setting up /etc/group
sudo bash -c 'cat > etc/group' <<EOF
root::0:root
user::1:user
utmp:x:16:
EOF

echo Setting up etc/fstab
sudo bash -c 'cat > etc/fstab' <<EOF
/dev/fhd0                 /                         ext2   defaults 1 1
none                      /proc                     proc   defaults
none                    /dev/pts                devpts  mode=0622       0 0
EOF

echo Setting up etc/sysconfig/keyboard
sudo bash -c 'cat > etc/sysconfig/keyboard' <<EOF
KEYTABLE=us
EOF

echo Setting up etc/securetty
sudo bash -c 'cat >> etc/securetty' <<EOF
cua0
tty0
EOF

echo Setting up etc/issue
sudo bash -c 'cat > etc/issue' <<EOF
Welcome to the user-mode kernel.
EOF

echo Copying /bin/true over /sbin/hwclock
sudo cp bin/true sbin/hwclock

echo Setting up etc/pam.d so you can log in
sudo rm etc/pam.d/*
sudo bash -c 'cat > etc/pam.d/other' <<EOF
#%PAM-1.0
auth     required       pam_unix_auth.so
account  required       pam_unix_acct.so
password required       pam_unix_passwd.so
session  required       pam_unix_session.so
EOF

sudo bash -c 'cat > etc/pam.d/ftp' <<EOF
#%PAM-1.0
auth     required       pam_unix_auth.so
account  required       pam_unix_acct.so
password required       pam_unix_passwd.so
session  required       pam_unix_session.so
EOF

echo Setting up /etc/sysconfig/network
sudo bash -c 'cat > etc/sysconfig/network' <<EOF
NETWORKING=yes
FORWARD_IPV4=false
HOSTNAME=uml
EOF

echo Setting up /etc/sysconfig/network-scripts/ifcfg-umn
sudo bash -c 'cat > etc/sysconfig/network-scripts/ifcfg-umn' <<EOF
DEVICE=umn
IPADDR=192.168.0.253
NETMASK=255.255.255.0
NETWORK=192.168.0.0
BROADCAST=192.168.0.255
ONBOOT=yes
EOF

echo Setting up /etc/sysconfig/network-scripts/ifup-umn
sudo bash -c 'cat > etc/sysconfig/network-scripts/ifup-umn' <<EOF
#!/bin/bash
cd /etc/sysconfig/network-scripts
. network-functions

CONFIG=\$1
source_config

if [ "\$2" != "boot" ]
then
    exit 0
fi

ether=""

for n in \`echo \$IPADDR | sed 's/\./ /g'\`
do
    ether="\$ether\`echo \$n | awk '{printf "%x", \$0}'\`:"
done

ether="\$ether"0:0

ifconfig \$DEVICE \$IPADDR hw ether \$ether 

exit 0
EOF

sudo chmod 755 etc/sysconfig/network-scripts/ifup-umn

cd ..
sudo umount $MNTDIR || exit 1

echo All set