check script

check script

[Jorge Almeida]

I ran socklog-conf and it created a file /etc/sv/socklog-unix/check that
looks like a run script:
 	#!/bin/sh
 	exec 2>/dev/null
 	exec socklog-check unix /dev/log
Reading the man page for socklog-check, I would expect the run script
for the socklog-unix service to be like
 	#!/bin/sh
 	exec 2>&1
 	socklog-check || exit 1
 	exec chpst -Usyslogger socklog unix /dev/log
Instead, it is
 	#!/bin/sh
 	exec 2>&1
 	exec chpst -Usyslogger socklog unix /dev/log
and the check script is just aside the run script.

Can someone explain what is the purpose of /etc/sv/socklog-unix/check?

-- 
Jorge Almeida

Re: check script

[Gerrit Pape]

On Mon, Mar 12, 2007 at 02:44:40PM +0000, Jorge Almeida wrote:
> I ran socklog-conf and it created a file /etc/sv/socklog-unix/check that
> looks like a run script:
> 	#!/bin/sh
> 	exec 2>/dev/null
> 	exec socklog-check unix /dev/log

> Can someone explain what is the purpose of /etc/sv/socklog-unix/check?

See http://smarden.org/runit/sv.8.html

It's run by 'sv start|restart|force-restart|check' and 'sv -v up'
to check whether the service is up and functional, and not only the
service daemon started.  Here it checks whether a program is listening
on /dev/log.

The ./check script is optional, and good for service dependencies.  For
services that run service daemons that use syslog() to write log
messages, 'sv start socklog-unix || exit' should be added to the run
script, to make sure that no log messages are lost on bootup because the
service daemon calls syslog() before the socklog-unix service actually
is listening on /dev/log.

HTH, Gerrit.

Re: check script

[Jorge Almeida]

On Tue, 13 Mar 2007, Gerrit Pape wrote:

>
> See http://smarden.org/runit/sv.8.html
I knew it had to be somewhere!
BTW, the main page http://smarden.org/runit/ doesn't have a link to
the program socklog-check. Is there a reason for this, or was it just an
overlook?
>
> It's run by 'sv start|restart|force-restart|check' and 'sv -v up'
> to check whether the service is up and functional, and not only the
> service daemon started.  Here it checks whether a program is listening
> on /dev/log.
>
> The ./check script is optional, and good for service dependencies.  For
> services that run service daemons that use syslog() to write log
> messages, 'sv start socklog-unix || exit' should be added to the run
> script, to make sure that no log messages are lost on bootup because the
> service daemon calls syslog() before the socklog-unix service actually
> is listening on /dev/log.
>
> HTH, Gerrit.
>
Thanks,

Jorge