Public bug reported:

Observed on Ubuntu Core 18, which uses initramfs-tools-ubuntu-
core_0.7.45+ppa5_all.deb (see https://launchpad.net/~snappy-
dev/+archive/ubuntu/image/+sourcepub/11283241/+listing-archive-extra),
but this issue appears to affect the official package in addition to the
one in the PPA.

The script which resizes the writable partition (scripts/local-
premount/resize) invokes "e2fsck -fy $writable_part" but it does not pay
attention to the exit code. Since the script is invoked with "-e" any
nonzero exit code will cause the script to exit. Looking at the manpage
for e2fsck (https://man7.org/linux/man-pages/man8/e2fsck.8.html) an exit
code of 1 means "File system errors corrected". It seems likely that if
there were only correctable errors that the script should continue and
run resize2fs.

The current behavior is that the script exits prematurely. The partition
has been resized, but the filesystem has not. Because Ubuntu Core 18
lacks the fix that will resize the filesystem even when the partition is
the correct size (https://git.launchpad.net/ubuntu/+source/initramfs-
tools-devices/tree/scripts/local-premount/resize?h=ubuntu/focal#n143)
this issue is not corrected even on a reboot. The issue can be worked
around by manually running resize2fs.

I found this issue because I was improperly ejecting an SD card after
flashing it with the Ubuntu Core 18 image, and wound up with ext4
filesystem issues. I was waiting for the flashing command to sync, so
all of the files were intact, but parts of Gnome were automouting it and
doing something with it, which I believe lead to the issues with the
filesystem that were correctable by e2fsck. I totally admit the root
cause here was due to operator error, and any image made with ubuntu-
image that is not accidentally corrupted due to premature ejection would
not exhibit this issue. That said, the end result was fairly difficult
to diagnose and the fix seems straightforward -- look at the exit code
from e2fsck -- so I figured I would report it.

** Affects: initramfs-tools-ubuntu-core (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1928741

Title:
  Root filesystem not resized if e2fsck repairs any issues

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