#!/bin/bash

#
# Usage: ./create_chroot_env5 username
#

# Here specify the apps you want into the enviroment
APPS="/bin/bash /bin/cat /bin/cp /bin/chmod /bin/ls \
/bin/mkdir /bin/mv /bin/touch /bin/pwd /bin/rm /bin/vi \
/usr/bin/id /usr/local/bin/scp /usr/local/bin/sftp \
/usr/local/libexec/sftp-server"

# Sanity check
if [ "$1" = "" ] ; then
    echo " Usage: ./create_chroot_env5 username"
    exit
fi

# Obtain username and HomeDir
CHROOT_USERNAME=$1
HOMEDIR=`grep /etc/passwd -e "^$CHROOT_USERNAME" | cut -d':' -f 6`
mkdir $HOMEDIR
chown root:root $HOMEDIR
cd $HOMEDIR

# Create writeable Directories only for you
mkdir {data,public_html}
chown $1:$1 {data,public_html}
chmod 711 {data,public_html}

# Create Directories no one will do it for you
mkdir {etc,bin,dev}
mkdir -p usr/bin
mkdir -p usr/local/{bin,libexec}
MAKEDEV -d dev -x null random zero

# Create short version to /usr/bin/groups 
# On some system it requires /bin/sh, 
# which is generally unnessesary in a chroot cage

echo "#!/bin/bash" > usr/bin/groups
echo "id -Gn" >> usr/bin/groups

# Add some users to ./etc/paswd
grep /etc/passwd -e "^root" -e "^$CHROOT_USERNAME" > etc/passwd
grep /etc/group -e "^root" -e "^$CHROOT_USERNAME" > etc/group

# Copy the apps and the related libs
for prog in $APPS; do
    cp $prog ./$prog

    # obtain a list of related libraryes
    ldd $prog > /dev/null
    if [ "$?" = 0 ] ; then 
    LIBS=`ldd $prog | awk '{ print $3 }'`
        for l in $LIBS; do
        mkdir -p ./`dirname $l` > /dev/null 2>&1
        cp $l ./$l
       done
    fi
done

# From some strange reason these 3 libraries are not in the ldd output, 
# but without them some stuff will not work, like usr/bin/groups
cp /lib/{libnss_compat.so.2,libnsl.so.1,libnss_files.so.2} ./lib/

# My original openssh'settings needs
cp -L /lib/ld-linux.so.2 ./lib/
cp /etc/{ld.so.cache,ld.so.conf,localtime} ./etc/