[MacPorts] #60534: Print status information for a daemon

[MacPorts]

#60534: Print status information for a daemon
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 Reporter:  FranklinYu   |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  base         |    Version:  2.6.2
 Keywords:               |       Port:
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 Ideally I would like something similar to `systemctl status` in systemd.
 I’m not sure whether everything is available though; I guess we can parse
 the output of `launchctl print` and get some information.

 The PID from `launchctl print` doesn’t look like the real daemon (at least
 it’s the case for Apache HTTP Server), but the `daemondo` process instead.
 The real PID locates at

 {{{
 /opt/local/var/run/apache2/httpd.pid
 }}}

 for Apache. I’m not sure whether it’s equivalent to show the status
 (running/error/not-loaded) of the `daemondo` process instead of the real
 one; showing `daemondo` process sounds more generic.

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Ticket URL: <https://trac.macports.org/ticket/60534>
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