#!/bin/bash
 #################################################
 #	Title:	prepare-build-root.sh   			#
 #        Date:	2014-12-12          			#
 #     Version:	1.0				                #
 #      Author:	sharathg@vmware.com             #
 #################################################
 set -o errexit
 set -o nounset
 set +h
 source common.inc
 
 PRGNAME=${0##*/}

 if [ $# -lt 1 ]; then
     fail "${PRGNAME}: No build root specified. Usage : ${PRGNAME} <build-root>"

 fi
 
 #Clean up our build root first
 BUILDROOT=$1
 PARENT=/usr/src/photon
 
 if mountpoint ${BUILDROOT}/run	>/dev/null 2>&1; then umount ${BUILDROOT}/run; fi
 if mountpoint ${BUILDROOT}/sys	>/dev/null 2>&1; then umount ${BUILDROOT}/sys; fi
 if mountpoint ${BUILDROOT}/proc	>/dev/null 2>&1; then umount ${BUILDROOT}/proc; fi

 if mountpoint ${BUILDROOT}/dev	>/dev/null 2>&1; then umount -R ${BUILDROOT}/dev; fi

 cp /etc/resolv.conf ${BUILDROOT}/etc/
 

 if [ ${EUID} -eq 0 ] ; then

 # 	Ommited in the filesystem.spec file - not needed for booting

     [ -e ${BUILDROOT}/dev/console ]	|| mknod -m 600 ${BUILDROOT}/dev/console c 5 1
     [ -e ${BUILDROOT}/dev/null ]	|| mknod -m 666 ${BUILDROOT}/dev/null c 1 3
     [ -e ${BUILDROOT}/dev/random ]	|| mknod -m 444 ${BUILDROOT}/dev/random c 1 8
     [ -e ${BUILDROOT}/dev/urandom ]	|| mknod -m 444 ${BUILDROOT}/dev/urandom c 1 9

     chown -R 0:0 ${BUILDROOT}/*	|| fail "${PRGNAME}: Changing ownership: ${BUILDROOT}: FAILURE"

 
 #
 #	Mount kernel filesystem
 #

     if ! mountpoint ${BUILDROOT}/dev	>/dev/null 2>&1; then mount --rbind /dev ${BUILDROOT}/dev; mount --make-rslave ${BUILDROOT}/dev; fi

     if ! mountpoint ${BUILDROOT}/proc	>/dev/null 2>&1; then mount -t proc proc ${BUILDROOT}/proc; fi
     if ! mountpoint ${BUILDROOT}/sys 	>/dev/null 2>&1; then mount -t sysfs sysfs ${BUILDROOT}/sys; fi
     if ! mountpoint ${BUILDROOT}/run	>/dev/null 2>&1; then mount -t tmpfs tmpfs ${BUILDROOT}/run; fi
     if [ -h ${BUILDROOT}/dev/shm ];			 then mkdir -pv ${BUILDROOT}/$(readlink ${BUILDROOT}/dev/shm); fi
 fi
 

 exit 0