#!/bin/bash
# Copyright 1999-2003 Gentoo Technologies, Inc.
# Distributed under the terms of the GNU General Public License v2
# $Header: $

# Ned Ludd <solar@gentoo.org>

CHROOTDIR=$1
BIN=$2

if [ "x${CHROOTDIR}" = "x" ]; then
	echo "Usage: mkchroot <dir> [path/bin]"
	exit
fi

umask 022

mkdir -p ${CHROOTDIR}
cd ${CHROOTDIR} || exit 1

mkdir -p etc dev proc tmp lib usr root home usr/bin usr/sbin usr/lib bin sbin var var/log var/run > /dev/null
[ -r "/etc/localtime" ] && cp /etc/localtime etc/

cd dev
  
[ ! -e tty ] && mknod -m 666 tty c 5 0  
[ ! -e null ] &&  mknod -m 666 null c 1 3
[ ! -e zero ] && mknod -m 666 zero c 1 5
[ ! -e urandom ] && mknod -m 644 urandom c 1 9

chown root:tty tty
chown root:sys null zero
if [ -e /proc/self/fd ] ; then    
	ln -fs /proc/self/fd fd 2> /dev/null
	ln -fs fd/0 stdin     
	ln -fs fd/1 stdout
	ln -fs fd/2 stderr  
fi
cd ..

# If were using a dynamically linked executable then
# we must figure out what libraries will be needed in 
# our chrooted environment.

cd ..

[ "x${BIN}" == "x" ] && exit 0

if [ -z "${BIN}" -o -z "${CHROOTDIR}" -o ! -f "${BIN}" ]; then
	echo "You have to enter both binary and directory name"
	exit -1
fi

LIBDIR=$(echo /lib /usr/lib; grep ^/ /etc/ld.so.conf)

ldd "${BIN}" | awk -F" " '{print $1}'| while read LIB; do	
	if [ $(echo "${LIB}"|cut -c1) != "/" ]; then
		# Looking for library in LIBDIRs
		LIB=$(find ${LIBDIR} \( -type f -o -type l \) -name "${LIB}"|head -n 1)
		if [ -z "${LIB}" ]; then
			echo "ERROR: Library ${LIB} not found"
			exit -1
		fi
	fi	
	SUBDIR=$(dirname "${LIB}");
	if [ ! -f ${CHROOTDIR}${LIB} ] ; then	   
		echo "Copying ${LIB} -> ${CHROOTDIR}${LIB}"
		mkdir -p "${CHROOTDIR}$SUBDIR" || exit 1	   
		cp "${LIB}" "${CHROOTDIR}${LIB}" || exit 1
		strip "${CHROOTDIR}${LIB}" || exit 1
        fi
done

if [ ! -x ${CHROOTDIR}/${BIN} ] ; then
	mkdir -p $(dirname ${CHROOTDIR}/${BIN})
	cp ${BIN} ${CHROOTDIR}/${BIN}
fi

echo "Done..."