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From: Charles Duffy <cduffy@spamcop.net>
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Subject: Re: runit - access to run script's exit status for finish?
Date: Mon, 29 Aug 2005 05:08:16 -0500
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Gerrit Pape wrote:
> To query this information, I would prefer to extend the sv program, not
> runsvstat.  runsvctrl, runsvstat, svwaitdown, svwaitup, most probably
> will get obsolete some time, as the functionality is integrated into sv.
> I'm not sure about the user interface, whether sv should support special
> commands for this, or command line switches, or so.

How about a subcommand with switches? Something like:

$ sv status <service1> <service2> ...
service1 STATUS (up|down|...)
service1 TIME <number-of-seconds>
service1 LASTEXIT <last run command's exit status>
service2 STATUS (up|down|...)
service2 TIME <number-of-seconds>
service2 LASTEXIT <last run command's exit status>
...

$ sv status -s <service1> <service2> ...
<state-of-service1>
<state-of-service2>

$ sv status -t <service1> <service2> ...
<number-of-seconds-for-service1>
<number-of-seconds-for-service2>

$ sv status -e <service1> <service2> ...
<last run command's exit status for service1>
<last run command's exit status for service2>

and so forth.

The full "sv status" output is trivially handlable with gawk, whereas 
the specific items (selectable w/ a flag) don't require even that, 
particularly if there's only one service named.