Comment 39 for bug 1892369

Test package results on focal: all good.

$ lsb_release -cs
focal

Before:
------

 $ sudo apt install --yes casper # focal-proposed

 $ dpkg -s casper | grep Version:
 Version: 1.445.2

1) Without fsck.mode=skip: check occurs (OK)

 $ cat /proc/cmdline
 BOOT_IMAGE=/vmlinuz-5.15.0-46-generic root=/dev/mapper/nvme--vg-root ro quiet splash mitigations=off vt.handoff=7

 $ sudo /usr/lib/casper/casper-md5check /tmp /dev/zero
 .
 Checking integrity, this may take some time
 ^C

2) With fsck.mode=skip last: check occurs (WRONG!)

 $ echo "$(cat /proc/cmdline) fsck.mode=skip" >/tmp/cmdline
 $ sudo mount --bind /tmp/cmdline /proc/cmdline

 $ cat /proc/cmdline
 BOOT_IMAGE=/vmlinuz-5.15.0-46-generic root=/dev/mapper/nvme--vg-root ro quiet splash mitigations=off vt.handoff=7 fsck.mode=skip

 $ sudo /usr/lib/casper/casper-md5check /tmp /dev/zero
 .
 Checking integrity, this may take some time
 ^C
 $ sudo umount /proc/cmdline

3) With fsck.mode=skip before last: check skipped (OK; workaround available)

 $ echo "$(cat /proc/cmdline) fsck.mode=skip workaround" >/tmp/cmdline
 $ sudo mount --bind /tmp/cmdline /proc/cmdline

 $ cat /proc/cmdline
 BOOT_IMAGE=/vmlinuz-5.15.0-46-generic root=/dev/mapper/nvme--vg-root ro quiet splash mitigations=off vt.handoff=7 fsck.mode=skip workaround

 $ sudo /usr/lib/casper/casper-md5check /tmp /dev/zero
 .
 Check skipped.
 ^C
 $ sudo umount /proc/cmdline

After:
-----

 $ sudo dpkg -i casper_1.445.3_amd64.deb

 $ dpkg -s casper | grep Version:
 Version: 1.445.3

1) Without fsck.mode=skip: check occurs (OK), and hint is provided

 $ cat /proc/cmdline
 BOOT_IMAGE=/vmlinuz-5.15.0-46-generic root=/dev/mapper/nvme--vg-root ro quiet splash mitigations=off vt.handoff=7

 $ sudo /usr/lib/casper/casper-md5check /tmp /dev/zero
 .
 Checking integrity, this may take some time (or try: fsck.mode=skip)
 ^C

2) With fsck.mode=skip last: check skipped (OK; FIXED!)

 $ echo "$(cat /proc/cmdline) fsck.mode=skip" >/tmp/cmdline
 $ sudo mount --bind /tmp/cmdline /proc/cmdline

 $ cat /proc/cmdline
 BOOT_IMAGE=/vmlinuz-5.15.0-46-generic root=/dev/mapper/nvme--vg-root ro quiet splash mitigations=off vt.handoff=7 fsck.mode=skip

 $ sudo /usr/lib/casper/casper-md5check /tmp /dev/zero
 .
 Check skipped.
 ^C
 $ sudo umount /proc/cmdline

3) With fsck.mode=skip before last: check skipped (OK; no regression)

 $ echo "$(cat /proc/cmdline) fsck.mode=skip workaround" >/tmp/cmdline
 $ sudo mount --bind /tmp/cmdline /proc/cmdline

 $ cat /proc/cmdline
 BOOT_IMAGE=/vmlinuz-5.15.0-46-generic root=/dev/mapper/nvme--vg-root ro quiet splash mitigations=off vt.handoff=7 fsck.mode=skip workaround

 $ sudo /usr/lib/casper/casper-md5check /tmp /dev/zero
 .
 Check skipped.
 ^C
 $ sudo umount /proc/cmdline