Ubuntu
debootstrap package

  1. Bug #1978862
  2. Comment #0

Comment 0 for bug 1978862

Revision history for this message
Steven Anderson (wanfuse123) wrote : deboostrap of debian guest shows recursive symlnks according to lsof ouput which interfears with unmounting chroot

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NOTE: the temporary exit of this script at the line:

' echo "temporary exit to make sure nothing else is screwing it up" && exit '

produces this error:

command: sudo lsof -x +D /root/uml-834523023462431000

lsof: WARNING: can't stat(/root/uml-834523023462431000/root_fs/var/run/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.speech-dispatcher/.speech-dispatcher/.speech-dispatcher/.cache/speech-dispatcher/.speech-dispatcher/.cache/speech-dispatcher/.speech-dispatcher/.cache/speech-dispatcher) symbolc link: Too many levels of symbolic links
lsof: WARNING: can't stat(/root/uml-834523023462431000/root_fs/var/run/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.cache/speech-dispatcher/.speech-dispatcher/.speech-dispatcher/.speech-dispatcher/.cache/speech-dispatcher/.speech-dispatcher/.speech-dispatcher/.cache/speech-dispatcher/log) symbolc link: Too many levels of symbolic links

#!/bin/bash -x

function aptUpdate_Inner {
DEBIAN_FRONTEND=noninteractive \
  apt-get update \
  -o Dpkg::Options::=--force-confold \
  -y --allow-downgrades --allow-remove-essential --allow-change-held-packages
}

aptUpdate_Inner

# https://askubuntu.com/questions/401454/how-to-get-sudo-access-to-shares-mounted-by-gigolo

logfile=dies_Inner-11.log
[ -e ~/"$logfile" ] || rm -rf "$logfile"

exec > >(tee -a "$logfile") 2> >(tee -a "$logfile" >&2)

basedir=uml-834523023462431000

thePrefix=~/"$basedir"/root_fs_img

function finish_Inner_Func {
  pushd ~
  lsof ~/"$basedir"/root_fs_img
  echo ~/"$basedir"/root_fs
  lsof ~/"$basedir"/root_fs
  lsof ~/"$basedir"/buster_uml
  read -r "Press any key to resume ..."
  read -r "Press any key to resume ..."
  read -r "Press any key to resume ..."
  echo "Trying to clean up Chroots that are left hanging..."
  umount ~/"$basedir"/root_fs_img/sys || echo "can't unmount sys"
  umount ~/"$basedir"/proc/sys/fs/binfmt_misc
  umount ~/"$basedir"/root_fs_img/proc || echo "can't unmount proc"
  umount ~/"$basedir"/root_fs_img/dev/pts || echo "can't unmount dev pts"
  umount ~/"$basedir"/root_fs_img/dev || echo "can't unmount dev"
  umount --recursive /root/"$basedir"/root_fs_img
  umount --recursive /root/"$basedir"/root_fs
  umount --recursive /root/"$basedir"
  umount ~/"$basedir"/root_fs_img || echo "can't unmountroot_fs_img" || exit
  pushd ~ || exit
  umount ~/"$basedir"/root_fs
  echo ~/"basedir"/root_fs_img
  lsof ~/"$basedir"/root_fs_img
  echo ~/"$basedir"/root_fs
  lsof ~/"$basedir"/root_fs
}

#trap finish_Inner_Func EXIT

function old_kill_proc {

thePrefix=~/"$basedir"
whatsFound=0
for root_file_Systems in /proc/*/root; do
    theLinks=$(readlink "$root_file_Systems")
    if [ "$theLinks" != "x" ]; then
        if [ "${theLinks:0:${#the_Prefix}}" = "$thePrefix" ]; then
            # this process is in the chroot...
            thePID="$(basename "$(dirname "$root_file_Systems")")"
            kill -9 "$thePID"
            whatsFound=1
        fi
    fi
done

if [ "$whatsFound" = "x1" ]; then

while grep -q "$thePrefix" /proc/mounts; do
    counters=$counters+1
    if [ "$counters" -ge 20 ]; then
        echo "failed to umount $thePrefix"
        if [ -x /usr/bin/lsof ]; then
            /usr/bin/lsof "$thePrefix"
        fi
    fi
    grep "$thePrefix" /proc/mounts | \
        cut -d\ -f2 | LANG=C sort -r | xargs -r -n 1 umount || sleep 1
done # repeat the above, the script I'm cargo-culting this from just re-execs itself
fi

}

# -o Dpkg::Options::=--force-confdef \

function chroot_Function {
success_chroot=0
echo "made it to build root?"
mount --rbind /dev ~/"$basedir"/root_fs/dev && echo "mounted dev" && success_chroot=1
mount devpts -t devpts --rbind /dev/pts ~/"$basedir"/root_fs/dev/pts && echo "mounted pts" && success_chroot=1
mount --rbind /proc -t proc ~/"$basedir"/root_fs/proc && echo "mounted proc" && success_chroot=1
mount --rbind /sys ~/"$basedir"/root_fs/sys && echo "mounted sys" && success_chroot=1

if ((! success_chroot==4)); then
 printf 'setting up bindings for the chrooot was unsuccessful\n' 1>&2
 exit 1
fi

}

if [[ -d ~/"$basedir" ]]
then
    printf '%s exists on your filesystem ... removing:\n ' "$basedir" && finish_Inner_Func && mkdir ~/"$basedir"
else
    printf 'basedir: does not exist so I will create root %s\n ' "$basedir" && mkdir ~/"$basedir"

fi

#chown -R "$USER:$USER" buster-uml
#chmod a+rwx buster-uml

fallocate -l 2G ~/"$basedir"/root_fs_img

mkfs -t ext4 ~/"$basedir"/root_fs_img

mkdir ~/"$basedir"/root_fs
mount -t ext4 ~/"$basedir"/root_fs_img ~/"$basedir"/root_fs
mount -o remount, rw ~/"$basedir"/root_fs

pushd ~/"$basedir" || printf 'failed to change the directory: /root/ %s \n' ~/"$basedir"
/usr/sbin/debootstrap --arch amd64 --variant minbase buster ~/"$basedir"/root_fs/ http://deb.debian.org/debian

echo "temporary exit to make sure nothing else is screwing it up" && exit
#rsync --verbose --archive --one-file-system --xattrs --hard-links --numeric-ids --sparse --acls buster-uml/ root_fs/

echo '/dev/ubd0 ext4 discard,errors=remount-ro 0 ' >> ~/"$basedir"/root_fs/etc/fstab

#if ! chroot ~/"$basedir"/root_fs_img /usr/bin/passwd; then
# printf 'failed to successfully execute the chroot\n' 1>&2
# exit 1
#fi

#if ! source /etc/environment; then
# printf 'failed to source environment\n' 1>&2
# exit 1
#fi

chroot_Function

if ! DEBIAN_FRONTEND=noninteractive apt update -y; then
        printf 'unable to install apt updates' 1>&2
        exit 1
fi

if ! DEBIAN_FRONTEND=noninteractive apt install ifupdown -y -q; then
        printf 'unable to install networking properly\n' 1>&2
 exit 1
fi

random_file="UML-$(shuf -i 2000000-7000000 -n 1))"
random_hostname="$random_file"

if ! echo "$random_hostname" > ~/"$basedir"/root_fs/etc/hostname; then
 printf 'failed to install random hostname\n' 1>&2
 exit 1
fi

~/"$basedir"/root_fs/etc/network/interfaces <<'interfaces_EOF'

# legacy UML network devices
auto eth0
iface eth0 inet dhcp

# vector UML network devices
auto vec0
iface vec0 inet dhcp
interfaces_EOF

if ! mkdir -p ~/"$basedir"/root_fs/usr/lib/modules/; then
 printf 'failed to create lib modules directory\n' 1>&2
 exit 1
fi

#if ! rsync -raHAXS /lib/modules/ ~/"$basedir"/root_fs/usr/lib/modules/; then
# printf 'rsync was not succesful files not propelry copied to the image file\n' 1>&2
# exit 1
#fi

echo 'End of SCRIPT_Inner...'

finish_Inner_Func

produces this lsof output :
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