[Bug 289368] freebsd-update can unexpectedly run on a pkgbase system

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 08 Sep 2025 06:26:14 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=289368

            Bug ID: 289368
           Summary: freebsd-update can unexpectedly run on a pkgbase
                    system
           Product: Base System
           Version: 14.3-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: bin
          Assignee: bugs@FreeBSD.org
          Reporter: grahamperrin@gmail.com

Created attachment 263589
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=263589&action=edit
Screenshot: FreeBSD 14.2-RELEASE-p2 in a VirtualBox guest

Follow up to bug 282252 (closed FIXED), 

> freebsd-update must refuse to run on a pkgbase system

Spun off from
<https://mail-archive.freebsd.org/cgi/mid.cgi?0100019925ee5903-52d095f3-c2c8-4f9d-8c22-6a9f68162c88-000000>,
where cperciva@ requests assistance from emaste@

In the attached screenshot of ttyv1, refusal is: 

-     effective during a run of script(1)

- not effective after the exit from script.

VirtualBox guest name: 
FreeBSD 13, 14, 15

VirtualBox snapshot name, at the time of the screenshot (visible in the title
bar):
freebsd-update on a pkgbase system preparing to download files for an insane
downgrade

I'll create another snapshot, named with the number of this bug report.

At this time, I'm mystified …

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