debian postinst

#!/bin/sh

#Assumes installation to /path/to/chroot
chroot_location=/path/to/chroot

# set -e #Commenting this out for now as mount returns non-zero
         #due to a remount of /sys
set -x

if [ "$1" = "configure" ];
then
    lenny_chroot_suffix=.lenny_chroot.old

    #Setup schroot.conf
    new_schroot_conf_file=/tmp/schroot.conf
    cat <<SCHROOT > $new_schroot_conf_file

[lenny]
description=Debian lenny for amd64
aliases=debian_lenny_amd64
location=$chroot_location
root-users=root
type=plain
users=root
groups=root
SCHROOT
    schroot_conf_file=/etc/schroot/schroot.conf
    archived_schroot_conf_file="${schroot_conf_file}${lenny_chroot_suffix}"

    #Put entries in place
    if [ -f $schroot_conf_file ];
    then
        #Old conf file exists, copy to archived
    cp $schroot_conf_file $archived_schroot_conf_file
        #Append additions
    cat $archived_schroot_conf_file $new_schroot_conf_file > $schroot_conf_file
    else
        #No old file, copy over conf file
    cp $new_schroot_conf_file $schroot_conf_file
    fi
    rm -f $new_schroot_conf_file

    #Setup fstab
    fstab_additions_file=/tmp/fstab_entries
    cat <<FSTAB > $fstab_additions_file

# fstab: static file system information for chroots.
#
# <file system> <mount point>   <type>  <options>   <dump>  <pass>
/proc       $chroot_location/proc       none    rw,bind        0       0
/sys        $chroot_location/sys        none    rw,bind        0       0
/tmp        $chroot_location/host/tmp   none    rw,bind        0       0
/dev/pts    $chroot_location/dev/pts    none    rw,bind     0   0
tmpfs       $chroot_location/dev/shm    tmpfs   defaults    0   0
/usr/local/akamai       $chroot_location/usr/local/akamai   ext2    rw,bind     0   0
/usr/local/akamai/logs      $chroot_location/usr/local/akamai/logs  ext2    rw,bind     0   0
/usr/local/akamai/coredumps $chroot_location/usr/local/akamai/coredumps ext2    rw,bind     0   0

FSTAB
    fstab_file=/etc/fstab
    archived_fstab_file="/etc/fstab${lenny_chroot_suffix}"

    #Append to fstab
    mv $fstab_file $archived_fstab_file
    cat $archived_fstab_file $fstab_additions_file > $fstab_file
    rm -f $fstab_additions_file

    #Assumes dpkg install as 'root'
    mount -a #Complains about re-mount of /sys

    exit 0
fi