Hi Steve, * Steve Lane <sdl...@lbl.gov> [2023-02-24 09:23]:
Currently unattended-upgrades marks the powermgmt-base package as Suggested. powermgmt-base provides the /sbin/on_ac_power and /usr/sbin/on_ac_power script(s), which unattended-upgrades requires to function at all, because of this check in /usr/bin/unattended-upgrade at line 676:if apt_pkg.config.find_b("Unattended-Upgrade::OnlyOnACPower", True) \ and subprocess.call("on_ac_power") == 1: The absence of the powermgmt-base package, and thus the on_ac_power script, results in the following error: root# /usr/bin/unattended-upgrade Traceback (most recent call last): File "/usr/bin/unattended-upgrade", line 2522, in <module> sys.exit(main(options)) File "/usr/bin/unattended-upgrade", line 1993, in main res = run(options, rootdir, mem_log, logfile_dpkg, File "/usr/bin/unattended-upgrade", line 2061, in run if should_stop(): File "/usr/bin/unattended-upgrade", line 676, in should_stop and subprocess.call("on_ac_power") == 1: File "/usr/lib/python3.9/subprocess.py", line 349, in call with Popen(*popenargs, **kwargs) as p: File "/usr/lib/python3.9/subprocess.py", line 951, in __init__ self._execute_child(args, executable, preexec_fn, close_fds, File "/usr/lib/python3.9/subprocess.py", line 1823, in _execute_child raise child_exception_type(errno_num, err_msg, err_filename) PermissionError: [Errno 13] Permission denied: 'on_ac_power'
I can't reproduce this error on a fresh stable nor unstable VM without powermgmt-base installed.
(Note that it's not clear to me why this is a PermissionError, since the script doesn't actually exist, but that is a secondary point.)
But this makes it reproducible: touch /usr/bin/on_ac_power So I guess you have a non executable on_ac_power in your $PATH.
The powermgmt-base package needs to be installed in order for unattended-upgrades to function at all. Thus, the powermgmt-base package needs to be marked as Depends for unattended-upgrades.
I disagree and propose this patch instead: https://github.com/mvo5/unattended-upgrades/pull/341 Cheers Jochen
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