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Full Discussion: Iso - remaster script trying to start chroot run commands then exit but host system gets messed up
Top Forums UNIX for Beginners Questions & Answers Iso - remaster script trying to start chroot run commands then exit but host system gets messed up Post 303039753 by paulhoffusa on Monday 14th of October 2019 04:12:10 PM
Old 10-14-2019
Code:
# Begin chroot 
chrootbeg() {
  echo "chrootbeg - beg funct ..."
  sudo mount --bind /dev/ unsquash/dev
  sudo chroot unsquash

  mount -t proc none /proc/
  mount -t sysfs none /sys/
  mount -t devpts none /dev/pts
  export HOME=/root
  export LC_ALL=C
  dbus-uuidgen > /var/lib/dbus/machine-id
  dpkg-divert --local --rename --add /sbin/initctl   //not sure what this does...
  ln -s /bin/true /sbin/initctl
}

# End chroot
chrootend(){
  echo "chrootend - beg funct ..."
  ap_clean
  rm -rf /tmp/* ~/.bash_history
  rm /var/lib/dbus/machine-id
  rm /etc/resolv.conf
  rm /sbin/initctl
  dpkg-divert --rename --remove /sbin/initctl
  #### Clean older/non-used kernels...
  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
  umount /proc || umount -lf /proc
  umount /sys || umount -lf /sys
  umount /dev/pts  || umount -lf /dev/pts
  #HELP - Uncomment or comment out lines below?
  #HELP - will exit exit function early and not execute unmount command below?
  # Move 2 lines outside of function to be executed after function
  #exit
  #sudo umount unsquash/dev || umount -lf unsquash/dev
  #HELP - END
}


#HELP - after this script ends run with 'm' option -
  # my system is messed up. Not sure if never chrooted correct or 
  # never exited correctly. I have a 30 GB VB image i have backed up
  # that  I have to restore from every time after this script runs
  # when trying to run all code inbetween the chrootbeg and chrootend
  # functions. Can some expert please give me something specific to try
  # I think my chroot code is flawed but not sure why. I can't even run 
  # the sudo command on main system after this script run after chroot.
  echo "Chrooting into the system ..."
  chrootbeg
  fn="/etc/apt/sources.list"
  cat $fn | grep "non-free" 2>/dev/null >/dev/null
  if [ "$?" != "0" ]; then
    if [ ! -f $fn.org ]; then
      cp $fn $fn.org
    fi
    echo "Modifying file '"$fn"' adding contrib and non-free repos ..."
    sed -i 's/main/main contrib non-free/g' $fn
    cp $fn $fn.mod
    echo; ls -la $fn*; echo
  fi
  echo "apt-get update ..."
  apt-get update
  echo "Deleting libreoffice ..."
  apt-get remove --purge libreoffice-*
  echo "Deleting all non English language packs ..." 
  apt-get remove --purge `dpkg-query -W --showformat='${Package}\n' | grep language-pack | egrep -v '\-en'`
  echo "apt-get upgrade ..."
  apt-get upgrade
  echo "Installing various packages that I need ..."
  apt install curl wget apt-transport-https dirmngr
  echo "Chrooting the system  is ending ..."
  chrootend 
  echo "WARN WARN WARN - Make sure line below is executed because occurs after an exit ..."
  echo "sudo umount unsquash/dev || umount -lf unsquash/dev"
  echo "Run 'mount | grep \"unsquash/dev\"' to check after this script exits!"
  exit
  sudo umount unsquash/dev || umount -lf unsquash/dev
  #HELP - END

 

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LEARN ABOUT DEBIAN

grml2iso

GRML2ISO(8)															       GRML2ISO(8)

NAME

       grml2iso - create a multiboot grml ISO using grml2usb

SYNOPSIS

       grml2iso -o <target.iso> <ISO[s]>

       Important! The grml team does not take responsibility for loss of any data!

INTRODUCTION

       grml2iso allows you to create a multiboot grml ISO. You can specify two or more grml ISOs and will get one single multiboot ISO as a
       result. grml2iso requires and uses grml2usb for this task and installs grub2 as bootmanager on the multiboot ISO.

OPTIONS

       grml2iso supports the environment variables GRML2USB and WRKDIR. GRML2USB specifies the path to the grml2usb script you'd like to use.
       WRKDIR specifies the work directory for creating the filesystem. The work directory needs at least as much free disk space as the sum of
       all specified ISOs.

       -o <target.iso>
	   This option is mandatory and specifies where the resulting multiboot grml ISO should be placed. Note that (to avoid any possible data
	   loss) grml2iso will exit if the specified target.iso exists already.

       -c <directory>
	   The content of the specified directory will be copied to the resulting multiboot grml ISO.

       -b <boot params>
	   Use specified default bootoptions as default.

       -f
	   Force the program to run and overwrite an existing iso image.

       -r <boot param>
	   Remove specified boot parameter from existing command line. Could be specified multiple times.

       -p <grml2usb param>
	   Execute grml2usb with the specified parameters. For a list of valid parameters have a look at the grml2usb webpage[1] or the grml2usb
	   manpage

       -s <URI>
	   Generate a small iso file which downloads the squashfs file from the specified URI. Due to current limitations in busyboxs wget and DNS
	   resolution, an URL can not contain a hostname but an IP only. This is useful if you want to boot systems which support booting iso
	   image from your local system. Besides the iso image this command also copies the squashfs file to the output directory.

USAGE EXAMPLES

	   # grml2iso -o /tmp/grml.iso grml_2009.05.iso grml64_2009.05.iso

       Create multiboot ISO /tmp/grml.iso with grml_2009.05.iso and grml64_2009.05.iso.

	   # grml2iso -b 'lang=de ssh=passwd' -c /tmp/grml-content -o /srv/grml.iso /srv/grml/grml_2009.10.iso

       Create a new iso with additional boot parameters and copy the content from /tmp/grml-content to the generated iso image.

	   # grml2iso -r quiet -r vga=791 -o /srv/grml.iso /srv/grml-small_2009.10.iso

       Create a new iso and remove existing boot parameters quiet and vga=791.

	   # GRML2USB=/srv/git/grml2usb grml2iso -o /srv/grml.iso /srv/grml/grml_2009.05.iso /srv/grml/grml64-medium_2009.05.iso

       Create multiboot ISO /srv/grml.iso with grml_2009.05.iso and grml64-medium_2009.05.iso using /srv/git/grml2usb as grml2usb script.

	   # WRKDIR=/mnt/test/grml-tmp grml2iso -o /mnt/test/grml.iso grml_2009.05.iso grml64_2009.05.iso

       Use /mnt/test/grml-tmp as working directory for creating the multiboot ISO /mnt/test/grml.iso with grml_2009.05.iso and grml64_2009.05.iso.

	   # grml2iso -p --skip-addons -o /srv/grml.iso /srv/grml-small_2009.10.iso /srv/grml64-small_2009.10.iso

       Don't copy the addons from the specified iso images

ONLINE RESSOURCES

       Check out the grml2usb webpage[1] and the grml2usb git repository[2].

BUGS

       Please report feedback, bugreports and wishes to the author.

AUTHORS

       Michael Prokop <mika@grml.org[3]> and Thorsten Glaser <tg@mirbsd.org[4]>

NOTES

	1. grml2usb webpage
	   http://grml.org/grml2usb/

	2. grml2usb git repository
	   http://git.grml.org/?p=grml2usb.git

	3. mika@grml.org
	   mailto:mika@grml.org

	4. tg@mirbsd.org
	   mailto:tg@mirbsd.org

								    05/28/2012							       GRML2ISO(8)
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