Re: Best way to run command on system start

On Sat, 4 May 2024 15:08:14 +0100, Polarian wrote:
> [...]
> I have read the forums and seen suggestions of using a rc service to
> set the backlight on boot, however there must be a better way to do
> this.

Yes, a rc.d-style script is the recommended solution, but if
everything you need to execute is just one simple command at
system boot time, create /etc/rc.local and place it there,
with full path.

A typical /etc/rc.local would start with:

	#!/bin/sh

	if [ -z "${source_rc_confs_defined}" ]; then
		if [ -r /etc/defaults/rc.conf ]; then
			. /etc/defaults/rc.conf
			source_rc_confs
		elif [ -r /etc/rc.conf ]; then
			. /etc/rc.conf
		elif [ -r /etc/rc.conf.local ]; then
			. /etc/rc.conf.local
		fi
	fi

This allows you to add custom options to /etc/rc.conf or
/etc/rc.conf.local, and your own scripts can benefit from
the defaults in /etc/defaults/rc.conf, if that's needed.

It can then contain your commands, like

	echo -n " backlight"
	/usr/bin/backlight 50

It will print a "description" of the current task and then
execute it. If you have more than one of such tasks, the
console output will look like this:

	Starting local daemons: activity startsound parallel.

But as it has been mentioned, /usr/local/etc/rc.d (or maybe
even /opt/rc.d) is the proper thing to do if you need to run
something more complicated.




--
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...