From owner-freebsd-questions@FreeBSD.ORG  Wed Mar  7 21:08:03 2007
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Subject: Re: /usr/local/etc/rc.d startup scripts
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On Wed, 7 Mar 2007 13:40:09 -0600
Dan Nelson <dnelson@allantgroup.com> wrote:

> In the last episode (Mar 07), Don O'Neil said:
> > Are there any special naming requirements for scripts in
> > /usr/local/etc/rc.d for 6.1?
> > 
> > Someone is telling me they need to have a .sh suffix to startup
> > correctly, but in past versions of FreeBSD anything you put in there
> > would run as long as it was executable.
> 
> Scripts in /usr/local/etc/rc.d are processed using a two-pass method.
> New rc.subr-style scripts are detected by the presence of a 
> "# PROVIDE:" line, and are ordered based on dependencies listed in
> REQUIRE and BEFORE lines.  Old-style scripts have to end in *.sh, and
> are run in alphabetical order after new scripts.  Files not ending in
> .sh without a PROVIDE: line are ignored.
> 

An RcNG script that ends in .sh is sourced into the current shell
rather than executed in a new one. This allows you to bring down the
entire boot process. Assuming this behaviour applies to local RcNG
scripts too, it's best to avoid the .sh suffix.