libpam-tmpdir breaks grml-debootstrap

[adrelanos]

https://packages.debian.org/bookworm/libpam-tmpdir installed on the host operating system breaks grml-debootstrap.

+ chroot /mnt/derivative-maker-grml-debootstrap.10940 dpkg --list grub-pc
+ echo 'Notice: grub-pc package not present yet, installing it therefore.'
Notice: grub-pc package not present yet, installing it therefore.
+ DEBIAN_FRONTEND=noninteractive
+ chroot /mnt/derivative-maker-grml-debootstrap.10940 apt-get -y --no-install-recommends install -o Acquire::http::Proxy=http://127.0.0.1:3142 -o Acquire::https::Proxy=http://127.0.0.1:3142 -o Acquire::tor::Proxy=http://127.0.0.1:3142 -o APT::Update::Error-Mode=any -o Acquire::Languages=none -o Acquire::IndexTargets::deb::Contents-deb::DefaultEnabled=false -o Apt::Install-Recommends=false -o Acquire::Retries=5 -o Dpkg::Options::=--force-confnew grub-pc
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following additional packages will be installed:
  dmsetup gettext-base grub-common grub-pc-bin grub2-common libbrotli1 libdevmapper1.02.1 libefiboot1 libefivar1 libfreetype6 libfuse2 libpng16-16 sensible-utils ucf
Suggested packages:
  multiboot-doc grub-emu mtools xorriso desktop-base console-setup fuse
Recommended packages:
  os-prober
The following NEW packages will be installed:
  dmsetup gettext-base grub-common grub-pc grub-pc-bin grub2-common libbrotli1 libdevmapper1.02.1 libefiboot1 libefivar1 libfreetype6 libfuse2 libpng16-16 sensible-utils
  ucf
0 upgraded, 15 newly installed, 0 to remove and 0 not upgraded.
Need to get 6068 kB of archives.
After this operation, 27.8 MB of additional disk space will be used.
...
Setting up grub-pc (2.06-13+deb12u1) ...
mktemp: failed to create file via template '/tmp/user/0/grub.XXXXXXXXXX': No such file or directory
dpkg: error processing package grub-pc (--configure):
 installed grub-pc package post-installation script subprocess returned error exit status 1
Processing triggers for libc-bin (2.36-9+deb12u3) ...
Errors were encountered while processing:
 grub-pc
E: Sub-process /usr/bin/dpkg returned an error code (1)

Running:

    chroot "${MNTPOINT}" mkdir --parents /tmp/user/0/

before:

    if ! chroot "${MNTPOINT}" dpkg --list grub-pc 2>/dev/null | grep -q '^ii' ; then
      echo "Notice: grub-pc package not present yet, installing it therefore."
      # shellcheck disable=SC2086
      DEBIAN_FRONTEND=$DEBIAN_FRONTEND chroot "$MNTPOINT" apt-get -y --no-install-recommends install $DPKG_OPTIONS grub-pc
    fi

Fixes this.

For the purpose of a PR to fix this: Can I add this mkdir unconditionally or should this only be done conditionally if using libpam-tmpdir (in that case environment variables TMP, TEMP and TMPDIR will be set accordingly already).

I will also investigate alternative solutions. 1 comes to mind. Maybe installing libpam-tmpdir inside the chroot would prevent this too. Will test.

[adrelanos]

Maybe installing libpam-tmpdir inside the chroot would prevent this too. Will test.

Yes. Using grml-debootstrap with --include=...,libpam-tmpdir also fixed the issue for me.

Good enough for me but maybe you also want a general bugfix for everyone.

[adrelanos]

Yes. Using grml-debootstrap with --include=...,libpam-tmpdir also fixed the issue for me.

Unfortunately, this is insufficient. Later on, dracut installation is failing.

+ echo 'Generating initrd.'
Generating initrd.
+ '[' dracut = dracut ']'
+ DEBIAN_FRONTEND=noninteractive
+ apt-get -y --no-install-recommends install -o Acquire::http::Proxy=http://127.0.0.1:3142 -o Acquire::https::Proxy=http://127.0.0.1:3142 -o Acquire::tor::Proxy=http://127.0.0.1:3142 -o APT::Update::Error-Mode=any -o Acquire::Languages=none -o Acquire::IndexTargets::deb::Contents-deb::DefaultEnabled=false -o Apt::Install-Recommends=false -o Acquire::Retries=5 -o Dpkg::Options::=--force-confnew dracut
Reading package lists... Done
...
Processing triggers for dracut (059-4) ...
dracut: Generating /boot/initrd.img-6.1.0-13-amd64
realpath: /tmp/user/0: No such file or directory
dracut: Invalid tmpdir '/tmp/user/0'.
dpkg: error processing package dracut (--configure):
 installed dracut package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 dracut
E: Sub-process /usr/bin/dpkg returned an error code (1)
++ error_handler

[adrelanos]

Added to function preparechroot:

mkdir --parents "${MNTPOINT}/${TMPDIR}"

That helped a bit but still having dracut issues.

dracut-install: ERROR: installing 'poweroff'
dracut-install: ERROR: installing 'reboot'
dracut-install: ERROR: installing 'halt'
dracut: FAILED: /usr/lib/dracut/dracut-install -D /tmp/user/0/dracut.Yir3ea/initramfs -a umount poweroff reboot halt losetup stat sleep timeout
+ dracut --no-hostonly --kver 6.1.0-13-amd64 --fstab --add-fstab /etc/fstab --force --reproducible

[adrelanos]

Even a workaround prepending:

     sudo env --unset TMPDIR --unset TMP --unset TEMPDIR  --unset TEMP grml-debootstrap ...

does not help.

[adrelanos]

Added to function preparechroot:

mkdir --parents "${MNTPOINT}/${TMPDIR}"

That helped a bit but still having dracut issues.

dracut-install: ERROR: installing 'poweroff'
dracut-install: ERROR: installing 'reboot'
dracut-install: ERROR: installing 'halt'
dracut: FAILED: /usr/lib/dracut/dracut-install -D /tmp/user/0/dracut.Yir3ea/initramfs -a umount poweroff reboot halt losetup stat sleep timeout
+ dracut --no-hostonly --kver 6.1.0-13-amd64 --fstab --add-fstab /etc/fstab --force --reproducible

That is actually a different issue:

• https://github.com/grml/grml-debootstrap/issues/233

[adrelanos]

I managed to fix grml-debootstrap comparability with libpam-tmpdir. 3 changes were required.

• 1) In function preparechroot added: [ -n "$TMPDIR" ] && mkdir --parents "${MNTPOINT}/${TMPDIR}"
• 2) installation of the libpam-tmpdir package using grml-debootstrap with --include
• 3) installation of the libpam-systemd package using the same. (https://github.com/grml/grml-debootstrap/issues/233)

Now works for me. Image is bootable.

[adrelanos]

TODO, in short: implement clean_chroot() { env -i chroot "$@" }

---

as previously discussed in https://github.com/grml/grml-debootstrap/pull/234

@zeha

Instead of $chroot, we could have sth like clean_chroot() { env -i chroot "$@" } (?)

@adrelanos

Since @mika liked the post, seems to agree with it (and I personally don't need the environment variable), I am happy to and will attempt to implement this at a later time when other PR is ready and merged to avoid merge conflicts.