#!/bin/bash
#
# vserver-reference	Builds VServer reference
#
# Load before pl_conf, pl_nm, vcached, and vservers
# chkconfig: 3 60 80
# description: Builds VServer reference image
#
# Mark Huang <mlhuang@cs.princeton.edu>
# Copyright (C) 2004 The Trustees of Princeton University
#
# $Id: vserver-reference.init,v 1.2 2004/10/14 18:37:40 mlhuang Exp $
#

case "$1" in
    start|restart|reload)
	;;
    stop|status)
	exit 0
	;;
    *)
	echo $"Usage: $0 {start|stop|restart|status}"
	exit 1
	;;
esac

# Source function library.
. /etc/init.d/functions

# VServer definitions
. /usr/lib/util-vserver/util-vserver-vars

# Save stdout and stderr
exec 3>&1
exec 4>&2

# Redirect stdout and stderr to a log file
exec 2>&1
exec &>/var/log/vserver-reference.log

# Make /vservers
mkdir -p $VROOTDIR
chmod 000 $VROOTDIR
chattr +t $VROOTDIR

# Build image in /vservers/.vtmp
mkdir -p $VROOTDIR/.vtmp
VROOT=$(mktemp -d $VROOTDIR/.vtmp/vserver-reference.XXXXXX)

# Make /vservers/.vtmp/vserver-reference.XXXXXX
mkdir -p $VROOT
chattr -t $VROOT
chmod 755 $VROOT

echo -n $"Building VServer reference: " >&3 2>&4

# Clean up before exiting if anything goes wrong
trap "umount $VROOT/proc ; umount $VROOT/dev/pts ; chattr -R -i $VROOT ; rm -rf $VROOT ; failure >&3 2>&4 ; echo >&3 2>&4 ; exit 255" ERR

MAKEDEV ()
{
    rm -rf $VROOT/dev
    mkdir -p $VROOT/dev
    mknod -m 666 $VROOT/dev/null c 1 3
    mknod -m 666 $VROOT/dev/zero c 1 5
    mknod -m 666 $VROOT/dev/full c 1 7
    mknod -m 644 $VROOT/dev/random c 1 8
    mknod -m 644 $VROOT/dev/urandom c 1 9
    mknod -m 666 $VROOT/dev/tty c 5 0
    mknod -m 666 $VROOT/dev/ptmx c 5 2
    touch $VROOT/dev/hdv1
}

# Initialize /dev in reference image
MAKEDEV

# Mount /dev/pts in reference image
mkdir -p $VROOT/dev/pts
mount -t devpts none $VROOT/dev/pts

# Mount /proc in reference image
mkdir -p $VROOT/proc
mount -t proc none $VROOT/proc

# Create a dummy /etc/fstab in reference image
mkdir -p $VROOT/etc
cat > $VROOT/etc/fstab <<EOF
# This fake fstab exists only to please df and linuxconf.
/dev/hdv1	/	ext2	defaults	1 1
EOF

# Prevent all locales from being installed in reference image
mkdir -p $VROOT/etc/rpm
cat > $VROOT/etc/rpm/macros <<EOF
%_install_langs en_US:en
%_excludedocs 1
%__file_context_path /dev/null
EOF

# Initialize RPM database in reference image
mkdir -p $VROOT/var/lib/rpm
rpm --root $VROOT --initdb

# Update certificates
if [ -d /mnt/cdrom/bootme/cacert ] ; then
    SSLCERTDIR="--sslcertdir /mnt/cdrom/bootme/cacert"
    find /mnt/cdrom/bootme/cacert | cpio -p -d $VROOT
fi

# Install RPMs in reference image
yum $SSLCERTDIR --installroot=$VROOT -y groupinstall VServer

# Clean up /dev in reference image
umount $VROOT/dev/pts
MAKEDEV

# Disable all services in reference image
chroot $VROOT /bin/sh -c "chkconfig --list | awk '{ print \$1 }' | xargs -i chkconfig {} off"

# Copy configuration files from host to reference image
for file in /etc/hosts /etc/resolv.conf /etc/yum.conf ; do
    if [ -f $file ] ; then
	echo $file | cpio -p -d -u $VROOT
    fi
done

# Clean up
umount $VROOT/proc

# Swap them when complete
mv $VROOT $VROOTDIR
if [ -d $VROOTDIR/vserver-reference ] ; then
    mv $VROOTDIR/vserver-reference $VROOT
    # Let vcached clean it up later
fi
mv $VROOTDIR/$(basename $VROOT) $VROOTDIR/vserver-reference

# Disable again
chkconfig vserver-reference off

success >&3 2>&4
echo >&3 2>&4
exit 0