Bug 55201 – Update to UCS 5.0-0 fails due to "empty" fetchmailrc with univention-ox-fetchmail installed

Bug 55201 - Update to UCS 5.0-0 fails due to "empty" fetchmailrc with univention-ox-fetchmail installed


Summary:	Update to UCS 5.0-0 fails due to "empty" fetchmailrc with univention-ox-fetch...

Status:	NEW

Product:	UCS
Classification:	Unclassified
Component:	Update - Release updates
Version:	UCS 5.0
Hardware:	Other Linux

Importance:	P5 normal (vote)
Target Milestone:	---
Assigned To:	UCS maintainers
QA Contact:	UCS maintainers

URL:
Keywords:

Depends on:	52923
Blocks:
	Show dependency tree / graph

Reported:	2022-09-13 18:29 CEST by Erik Damrose
Modified:	2023-09-30 07:26 CEST (History)
CC List:	2 users (show)

See Also:	56673
What kind of report is it?:	Bug Report
What type of bug is this?:	5: Major Usability: Impairs usability in key scenarios
Who will be affected by this bug?:	2: Will only affect a few installed domains
How will those affected feel about the bug?:	5: Blocking further progress on the daily work
User Pain:	0.286
Enterprise Customer affected?:	Yes
School Customer affected?:
ISV affected?:
Waiting Support:
Flags outvoted (downgraded) after PO Review:
Ticket number:	2022080921000684
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Max CVSS v3 score:

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Description Erik Damrose

2022-09-13 18:29:25 CEST

When univention-ox-fetchmail is installed, the update to UCS 5 may fail, leaving the server package state inconsistent.

The following was implemented into the UCS 5.0-0 preup.sh, with a check for univention-fetchmail. We also need the check for the ox specific package univention-ox-fetchmail, the same error occurs with that package.

+++ This bug was initially created as a clone of Bug #52923 +++

In the postinst script of fetchmail, the fetchmail service is restarted automatically during the update to UCS 5.0-0. If there is no "poll" entry in /etc/fetchmailrc, the restart of the fetchmail polling daemon fails and unfortunately the fetchmail.postinst also fails. This causes an abortion of the update to UCS 5.0-0.

To prevent this problematic behaviour, in preup.sh the fetchmail.service stopped and then disabled via the corresponding UCR variable: 

  ucr set fetchmail/autostart=no

The old value of "fetchmail/autostart" is saved in the UCR variable "fetchmail/autostart/update500" and restored in postup.sh. Also a restart of fetchmail.service is attempted in postup.sh.