0

What's the idiomatic way? I'd prefer the most standard and yet simple way with fewer additional dependencies. Something like an alternative to systemd of Linux.

0

Installed processes can be restarted automatically by adding to /etc/rc.conf

yourprocess_enable="YES"

FreeBSD System Startup for Linux Users

but that's assuming there is a start up script in /usr/local/etc/rc.d/

The FreeBSD Handbook - Starting Services

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0

As mentioned, <service>_enable=YES in /etc/rc.conf (or relevant rc.conf.d files) will start a service on boot.

For restarting on crashes, the canonical way to do it would involve daemontools.

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0

If you do not already have an rc.d script for your process, you can fairly easily achieve the desired result with the daemon(8) command. The command will run a child process in the background, and with the command line option -r, you can get it to restart the child process if it dies:

$ daemon -r /some/path/to/command

In later versions of FreeBSD, you can specify -R <delay in seconds> to specify how long to wait before restarting the process.

To start the process after rebooting, specify the command in the crontab(5) file like this:

@reboot daemon -r /some/path/to/command

To edit the crontab file, use

$ crontab -e
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-1

You can add script to cron every (in example) two minutes:

#!/bin/sh

process = 'my-secret-service' # process name

if ps ax | grep -v grep | grep $process
then
    echo "$process is alive."
else
    echo "$process is dead, but will be launched."
/usr/local/bin/my-secret-service #launch command

fi
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