Help for a script - confusing with daemon and service

[Ernie95]

Hi All,

Thanks in advance for your help, as I am discovering FreeBSD.

I am trying to have AdGuardHome in a jail. Thanks to Thogs for the HowTo (https://forums.freebsd.org/threads/guide-how-to-install-adguardhome-on-freebsd.75496/).

My jail works, I have FreeBSD 12.3 and I successful installed AdGuardHome.

But I am trying to have a script which restarts AdGuardHome if it stops.

The HowTo proposes to create a service (I suppose as it) with a specific file: /etc/rc.d/adguardhome
The content is

#!/bin/sh
. /etc/rc.subr
name="adguardhome"
rcvar="adguardhome_enable"
adguardhome_user="root"
adguardhome_command="/opt/AdGuardHome/AdGuardHome"
pidfile="/var/run/${name}.pid"
command="/usr/sbin/daemon"
command_args="-P ${pidfile} -r -f ${adguardhome_command}"
load_rc_config $name
: ${adguardhome_enable:=no}
run_rc_command "$1"[/ICODE]

I found a script for relaunching AdGuardHome but it seems that it scans the daemon:
[CODE]#!/bin/sh
SERVICE="AdGuardHome"
if
 /usr/bin/pgrep -x "$SERVICE" >/dev/null
then
 exit 0
 #echo "$SERVICE is running"
else
nohup /AdGuardHome/AdGuardHome &
 # mail
fi

What I observed before to implement the script:
- AdGuardHome is running and if there is a reboot, it is launched (rc.conf contains the relevant row for this)
- if I use : service adguardhome stop, the service is stopped (based on the code of adguarhome file in /etc/rc.d)
- and after stopping adguardhome, pgrep AdGuardHome shows a PID : so the daemon is always launched

How can I stop the service and the daemon ? I thought that both were linked.

Sure if I launch again the service adguardhome just after stopping it, I see with pgrep 2 PID numbers and not one

Thanks for your help, and pedagogic explanations

BR

 

[ondra_knezour]

See 6.26. Starting and Stopping Services (rc Scripts) and other resources linked in the chapter intro for overview how this all works.

I get lost somewhere between shows a PID : and pgrep 2 PID numbers, so no direct answer here, but you definitely don't need another script to check if service is running. You should have service adguardhome status command already and than service adguardhome status || service adguardhome start (shell construct with OR -> if first command doesn't return what you want, run second one) may be enough. Except for looking why the service is dying in the first place

 

[ondra_knezour]

Looking into linked how-to - rc.d scripts for locally installed software belongs to /usr/local/etc/rc.d, not /etc/rc.d and if there is port/package, which is (www/adguardhome), why bother with manual installation instead of pkg install adguardhome?

 

[Erichans]

This may also be helpful: Practical rc.d scripting in BSD

Edit: I just noticed this is referenced in "Finally, there is an article on practical aspects of rc.d scripting" in the link ondra_knezour mentioned: 6.26. Starting and Stopping Services (rc Scripts).
Note: the link in the porters handbook mentioned in that section of chapter 6.26:

Details on its usage can be found in the rc.d Handbook chapter.

does not work; the correct URL for this link is:
https://docs.freebsd.org/en/books/handbook/book/#configtuning-rcd
(12.4. Managing Services in FreeBSD)

 

[Ernie95]

Thanks for your answers. I will investigate.
Why manual install ? Because I don't know very well freebsd. I will look freshport
Thanks again

 

[Ernie95]

Thanks. I solved it via a right installation (pkg install). It creates the script for service X stop/start/restart. And now the script (for checking that ADGH is launched or stopped) works well
Thanks again.