Jesse Smith:
881490 (Feature requests asks that, when user provides no valid action
for shutdown that we immediately power off, killing any running
processes. This sounds terrible/dangerous and we will not implement it
upstream. Report can be closed.)
This is a wildly inaccurate description of M. Thibault's request; unless
this counts as an admission that the -h flag to the van Smoorenburg
/sbin/shutdown is terrible and dangerous, and causes an immediate power
off. (-:
This is simply a request, as already mentioned in the bug report, that
-h be a no-op, and that what -h did now be the default behaviour. It is
motivated by compatibility with the shutdown commands from some other
toolsets (It is not only systemd's shutdown that makes what -h did the
default behaviour.) and by the premise that users will expect shutdown
to have a particular new syntax.
That said:
van Smoorenburg init is one of the two system management systems that
actually has a native concept of run levels in the first place (the
other one not being available in Debian). Shutting down to "run level
1" in the absence of -h or -r options still has meaning for it, even if
it has not for everyone else.
There's quite a lot different between the several shutdown programs of
different toolsets anyway. There is not a de facto standard; even
considering just Debian alone, let alone looking to upstart, real Unix
toolsets, the BSDs, and suchlike. Debian's shutdown shim added to runit
does not support any option other than -f, for example. And that is
undocumented.
* https://manpages.debian.org/unstable/runit-init/shutdown.8.en.html
* http://uw714doc.sco.com/en/man/html.1M/shutdown.1M.html
* http://manpages.ubuntu.com/manpages/trusty/man8/shutdown.8.html
* http://netbsd.gw.com/cgi-bin/man-cgi?shutdown+8
* https://man.openbsd.org/shutdown
*
https://www.ibm.com/support/knowledgecenter/ssw_aix_71/com.ibm.aix.cmds5/shutdown.htm
* http://jdebp.eu./Softwares/nosh/guide/shutdown.html
