#HELP - Function below creates a script and enters a chroot env then
#HELP - exec the script that the function created in the new chroot env
chrootexec unsquash
#HELP - END


# chrootexec - Creates a script then enters a chroot env then executes 
# the script in the chroot env then exits the chroot env
chrootexec() {
  # Creating the script to be executed in chroot env
  chrootdn=$1
  echo "chrootexec - beg funct - chrootdn = '"$chrootdn"' ..."
  currdn=`pwd`
  if [ ! -d "$currdn/$chrootdn" ]; then
    echo "ERROR - chrootdn '"$currdn/$chrootdn"' dir does NOT exist!"; exit 1
  fi
  chrootfn=`echo $currdn"/"$chrootdn"/"chroots`
  echo "Creating the chroot script to be run '"$chrootfn"' ..."
  sudo rm $chrootfn 2>/dev/null >/dev/null
  sudo touch $chrootfn
  sudo chmod 777 $chrootfn
  
  # Setup to enter chroot env
  echo "#!/bin/bash" >>$chrootfn
  echo "#PROGDESC - chroots - Script to be executed in chroot env ONLY !" >>$chrootfn
  echo "mount -t proc none /proc/" >>$chrootfn
  echo "mount -t sysfs none /sys/" >>$chrootfn
  echo "mount -t devpts none /dev/pts" >>$chrootfn
  echo "export HOME=/root" >>$chrootfn
  echo "export LC_ALL=C" >>$chrootfn
  echo "dbus-uuidgen > /var/lib/dbus/machine-id" >>$chrootfn
  echo "dpkg-divert --local --rename --add /sbin/initctl" >>$chrootfn   
  echo "ln -s /bin/true /sbin/initctl" >>$chrootfn
  
  # Put any custom code you want to execute below
  echo "echo \"chroot - my mods - beg ...\"" >>$chrootfn
  # https://superuser.com/questions/476512/how-do-i-permanently-reset-the-time-zone-in-debian
  echo "date | egrep \"PST|PDT\"" >>$chrootfn
  echo "if [ \"\$?\" != \"0\" ]; then" >>$chrootfn
  echo "  echo \"WARN - Timezone is != PDT or PST - Changing it!\"" >>$chrootfn
  echo "  echo 'America/Los_Angeles' > /etc/timezone" >>$chrootfn 
  echo "  rm /etc/localtime" >>$chrootfn
  echo "  dpkg-reconfigure -f noninteractive tzdata" >>$chrootfn
  echo "  `date`" >>$chrootfn
  echo "fi" >>$chrootfn
  echo "fn=\"/etc/apt/sources.list\"" >>$chrootfn
  echo "cat \$fn | grep \"non-free\" 2>/dev/null >/dev/null" >>$chrootfn
  echo "if [ \"\$?\" != \"0\" ]; then" >>$chrootfn
  echo "  if [ ! -f \$fn.org ]; then" >>$chrootfn
  echo "    cp \$fn \$fn.org" >>$chrootfn
  echo "  fi" >>$chrootfn
  echo "  echo \"Modifying file '\"\$fn\"' adding contrib and non-free repos ...\"" >>$chrootfn
  echo "  sed -i 's/main/main contrib non-free/g' "\$fn >>$chrootfn
  echo "  cp \$fn \$fn.mod" >>$chrootfn
  echo "  echo; ls -la \$fn*; echo" >>$chrootfn
  echo "fi" >>$chrootfn
  echo "echo \"apt-get update ...\"" >>$chrootfn
  echo "apt-get -y update" >>$chrootfn
  echo "apt -y --fix-broken install" >>$chrootfn
  echo "if [ -d /usr/lib/libreoffice ]; then" >>$chrootfn
  echo "  echo \"Deleting libreoffice ...\"" >>$chrootfn
  echo "  apt-get -y remove --purge libreoffice-*" >>$chrootfn
  echo "fi" >>$chrootfn
  echo "# Save over 2 GB of hard drive space from live install deleting progs below" >>$chrootfn
  echo "if [ -d /usr/share/doc/fonts-noto-extra ]; then" >>$chrootfn
  echo "  apt purge ubertooth-firmware-source" >>$chrootfn
  echo "  apt purge -y fonts-noto-extra" >>$chrootfn
  echo "  apt purge -y fonts-noto-cjk-extra" >>$chrootfn
  echo "  apt purge -y fonts-noto-cjk" >>$chrootfn
  echo "  apt purge -y fonts-noto-ui-extra" >>$chrootfn
  echo "  apt purge -y fonts-noto-core" >>$chrootfn
  echo "  apt purge -y fonts-noto-color-emoji" >>$chrootfn
  echo "  apt purge -y fonts-noto-ui-core" >>$chrootfn
  echo "  apt purge -y fonts-noto-unhinted" >>$chrootfn
  echo "  apt purge -y fonts-noto-mono" >>$chrootfn
  echo "  # Remove all foreign dictionaries then install only american" >>$chrootfn
  echo "  apt purge -y aspell" >>$chrootfn
  echo "  apt-get -y install iamerican" >>$chrootfn
  echo "  apt-get -y autoremove" >>$chrootfn
  echo "fi" >>$chrootfn
  echo "if [ -f /usr/bin/clipit ]; then" >>$chrootfn
  echo "  apt-get -y purge clipit" >>$chrootfn
  echo "  pkill clipit" >>$chrootfn
  echo "fi" >>$chrootfn
  echo "echo \"Deleting all non English language packs ...\"" >>$chrootfn
  echo "apt-get -y remove --purge \`dpkg-query -W --showformat='${Package}\n' | grep language-pack | egrep -v '\-en'\`" >>$chrootfn
  echo "apt -y autoremove" >>$chrootfn
  echo "echo \"apt-get upgrade ...\"" >>$chrootfn
  echo "apt-get -y upgrade" >>$chrootfn
  echo "echo \"Installing various packages that I need ...\"" >>$chrootfn
  echo "apt -y install curl wget apt-transport-https dirmngr" >>$chrootfn
  echo "if [ ! -f /usr/bin/sensors ]; then" >>$chrootfn
  echo "  sudo apt-get -y install lm-sensors" >>$chrootfn 
  echo "fi" >>$chrootfn
  echo "if [ ! -f /usr/sbin/hddtemp ]; then" >>$chrootfn
  echo "  sudo apt-get -y install hddtemp" >>$chrootfn
  echo "fi" >>$chrootfn
  echo "if [ ! -f /usr/sbin/rfkill ]; then" >>$chrootfn
  echo "  sudo apt-get -y install rfkill" >>$chrootfn 
  echo "fi" >>$chrootfn
  echo "if [ ! -f /usr/bin/dos2unix ]; then" >>$chrootfn
  echo "  sudo apt-get -y install dos2unix" >>$chrootfn
  echo "fi" >>$chrootfn
  echo "if [ ! -d /etc/cifs-utils ]; then" >>$chrootfn 
  echo "  sudo apt-get -y install cifs-utils # for mapdrv routine to work" >>$chrootfn
  echo "fi" >>$chrootfn
  echo "if [ ! -f /usr/bin/upower ]; then" >>$chrootfn
  echo "  sudo apt-get -y install upower" >>$chrootfn
  echo "fi" >>$chrootfn
  echo "if [ ! -f /usr/bin/adb ]; then" >>$chrootfn
  echo "  sudo apt-get -y install adb" >>$chrootfn
  echo "fi" >>$chrootfn
  echo "if [ ! -d /usr/lib/ntp ]; then" >>$chrootfn
  echo "  sudo apt-get -y install ntp" >>$chrootfn
  echo "fi" >>$chrootfn
  echo "if [ ! -f /usr/bin/geany ]; then" >>$chrootfn
  echo "  apt-get -y install geany" >>$chrootfn
  echo "fi" >>$chrootfn
  echo "if [ ! -f /usr/bin/xdiskusage ]; then" >>$chrootfn
  echo "  sudo apt-get -y install xdiskusage" >>$chrootfn 
  echo "fi" >>$chrootfn 
  echo "if [ ! -f /usr/bin/meld ]; then" >>$chrootfn
  echo "  sudo apt-get -y install meld" >>$chrootfn
  echo "fi" >>$chrootfn
  echo "if [ ! -f /usr/bin/gdebi ]; then" >>$chrootfn
  echo "  sudo apt-get -y install gdebi" >>$chrootfn
  echo "fi" >>$chrootfn
  echo "if [ ! -d /usr/share/doc/firmware-linux-nonfree ]; then" >>$chrootfn
  echo "  apt-get -y install firmware-linux-nonfree" >>$chrootfn
  echo "fi" >>$chrootfn
  echo "if [ ! -d /usr/share/bug/firmware-iwlwifi ]; then" >>$chrootfn
  echo "  # NOTES - Need this for my wireless AC card in laptop is recognized" >>$chrootfn
  echo "  apt-get -y install firmware-iwlwifi" >>$chrootfn
  echo "fi" >>$chrootfn
  echo "if [ ! -f /usr/bin/ristretto ]; then" >>$chrootfn
  echo "  sudo apt-get -y install ristretto # Open/Browse pictures quickly" >>$chrootfn
  echo "fi" >>$chrootfn
  echo "if [ ! -f /usr/bin/system-config-printer ]; then" >>$chrootfn
  echo "  apt-get -y install system-config-printer #printer support" >>$chrootfn
  echo "fi" >>$chrootfn
  # easytether made no internet on remast live cd
  # when i tried to uninstall resolvconf it prompted me with dialog
  # box that I couldn't bypass
  #echo "apt-get -y purge resolvconf" >>$chrootfn
  #echo "ieprog easytether" >>$chrootfn
  echo "ieprog bootiso" >>$chrootfn
  echo "ieprog rclone" >>$chrootfn
  echo "ieprog golang" >>$chrootfn
  echo "ieprog liteide" >>$chrootfn
  echo "echo \"INFO - Only install flashplayer on Debian NOT on Ubuntu - Install takes FOREVER !!!\"" >>$chrootfn
  echo "if [ ! -f /usr/lib/mozilla/plugins/libflashplayer.so ]; then" >>$chrootfn
  echo "  ieprog flashplayer" >>$chrootfn
  echo "fi" >>$chrootfn
  echo "echo \"chroot - my mods - end ...\"" >>$chrootfn
  
  # Setup to exit chroot env
  echo "echo \"\"" >>$chrootfn
  #echo "ap_clean" >>$chrootfn
  echo "rm -rf /tmp/* ~/.bash_history" >>$chrootfn
  echo "rm /var/lib/dbus/machine-id" >>$chrootfn
  echo "rm /etc/resolv.conf" >>$chrootfn
  echo "rm /sbin/initctl" >>$chrootfn
  echo "dpkg-divert --rename --remove /sbin/initctl" >>$chrootfn
  #echo "#### Clean older/non-used kernels..." >>$chrootfn
  #echo "dpkg -l 'linux-*' | sed '/^ii/!d;/'\"$(uname -r | sed \"s/\(.*\)-\([^0-9]\+\)/\1/\")\"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d' | xargs sudo apt-get -y purge" >>$chrootfn
  echo "umount /proc || umount -lf /proc" >>$chrootfn
  echo "umount /sys || umount -lf /sys" >>$chrootfn
  echo "umount /dev/pts || umount -lf /dev/pts" >>$chrootfn
  
  echo; echo "Displaying chroot created script ..."; echo; cat $chrootfn; echo
  
  # Ensure we have a resolv.conf file so internet will work - for chroot only
  fn=`echo $xdn"/unsquash/etc/resolv.conf"`
  if [ ! -f $fn ]; then
    sudo cp /etc/resolv.conf $fn
  fi
  echo; ls -la $fn; echo
  
  if [ "$atrue" = "Y" ]; then
    # Actually entering chroot env and executing the script then
    # exit the chroot sys then returning to host system    
    sudo mount --bind /dev/ $chrootdn/dev
    echo "BEG - Running chroot created script ...";
    # Changed chroot from running interactive commands to run a script
    #sudo chroot $chrootdn
    sudo chroot $chrootdn /bin/sh < $chrootfn
    echo "DONE - Running chroot created script ...";
    sudo umount $chrootdn/dev || sudo umount -lf $chrootdn/dev
  fi
}