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Update kill -TERM fallback to check that systemd is PID 1 

Also only execute the fallback when we're upgrading the RPM package.

Add a comment to indicate the actual bug in systemd v239 we're trying to
fix with this fallback.

Tested: Upgraded from v239 on a machine and confirmed that running
`sudo systemctl status` was working as expected after the upgrade, rather
than failing with "Access denied."
This commit is contained in:
Filipe Brandenburger 2020-02-21 14:59:01 -08:00 committed by Zbigniew Jędrzejewski-Szmek
parent 437cd52f28
commit 5c5a95ecb4
1 changed files with 27 additions and 2 deletions
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29
systemd.spec
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@ -543,7 +543,28 @@ getent passwd systemd-resolve &>/dev/null || useradd -r -u 193 -l -g systemd-res
%post
systemd-machine-id-setup &>/dev/null || :
systemctl daemon-reexec &>/dev/null || { test "$(cat /proc/1/comm 2>/dev/null)" = "systemd" && kill -TERM 1 &>/dev/null; } || :
systemctl daemon-reexec &>/dev/null || {
if test -d /run/systemd/system ; then
# systemd v239 had bug #9553 in D-Bus authentication of the private socket,
# which was later fixed in v240 by #9625.
#
# The end result is that a `systemctl daemon-reexec` call as root will fail
# when upgrading from systemd v239, which means the system will not start
# running the new version of systemd after this post install script runs.
#
# To work around this issue, let's fall back to using a `kill -TERM 1` to
# re-execute the daemon when the `systemctl daemon-reexec` call fails.
#
# In order to prevent issues when the reason why the daemon-reexec failed is
# not the aforementioned bug, let's only use this fallback when:
# - we're upgrading this RPM package; and
# - we confirm that systemd is running as PID1 on this system.
if [ $1 -gt 1 ] && [ -d /run/systemd/system ] ; then
kill -TERM 1 &>/dev/null || :
fi
}
journalctl --update-catalog &>/dev/null || :
systemd-tmpfiles --create &>/dev/null || :
@ -743,9 +764,13 @@ fi
%changelog
* Wed Feb 26 2020 Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> - 245~rc1-4
- Fix scriptlet to not kill non-systemd pid1 (#1803240)
- Modify the downstream udev rule to use bfq to only apply to disks (#1803500)
* Fri Feb 21 2020 Filipe Brandenburger <filbranden@gmail.com> - 245~rc1-4
- Update daemon-reexec fallback to check whether the system is booted with
systemd as PID 1 and check whether we're upgrading before using kill -TERM
on PID 1 (#1803240)
* Tue Feb 18 2020 Adam Williamson <awilliam@redhat.com> - 245~rc1-3
- Revert 097537f0 to fix plymouth etc. running when they shouldn't (#1803293)