From owner-freebsd-ports@freebsd.org  Thu Aug 31 16:00:52 2017
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Subject: Re: standard locations for port files
To: Ernie Luzar <luzar722@gmail.com>,
 "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org>,
 "freebsd-ports@freebsd.org" <freebsd-ports@freebsd.org>
References: <59A82622.4030502@gmail.com>
From: Eugene Grosbein <eugen@grosbein.net>
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Date: Thu, 31 Aug 2017 23:00:28 +0700
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31.08.2017 22:07, Ernie Luzar wrote:
> Lets say I have a product that I want to port to Freebsd.
> 
> Were is the standard location for the log file and PID file.
> 
> Would it be in
> /usr/local/etc/product/product.log
> /usr/local/etc/product/product.pid
> 
> or
> 
> /var/log/product.log
> /var/run/product.pid

FreeBSD cleans /var/run at boot time, so /var/run/product.pid is guaranteed to not exist
when "product" is first started that time.

On the other hand, /usr/local/etc/product/product.pid can (and will) exist after
unclean system reboot and it can contain a PID of already running another process,
so that simple check for double-start would fail.

So, use /var/run for PID files to be safe.