Re: Delaying Autostart

On 03/06/2025 15:17, Chris Elvidge wrote:

On 03/06/2025 at 14:00, Oscar wrote:

In article <101itmk$2mr8t$1@dont-email.me>,
Lawrence D'Oliveiro  <ldo@nz.invalid> wrote:

Instead of waiting for some fixed interval, you could add a prior command
using wget or something to repeatedly try accessing that URL, say at 5
second intervals or whatever, until it becomes accessible, before allowing
the startup to proceed.

>
For inspiration, I made a script to 'etherwake' a device and wait for it
to get ready using wget in combination with the 'timeout' command. I run
'timeout 1 wget <url>' which returns an error if wget does not respond
in 1 second, or wget returns an error itself. I use this in a while
loop that repeats this until the wget succeeds:
>
     etherwake -D -i ${IFACE} ${MACADDR}
>
     while ! timeout 1 curl --noproxy \* "${URL}" &> /dev/null
     do
         echo -n .
         sleep 1
     done
>
The OP could replace the 'sleep 120' in the other script with this loop.
>

 Why waste a curl call when ping 8.8.8.8 would work with less overhead?
 

+1. Assuming that pings to the Wide World are not blocked by the network
--
"Strange as it seems, no amount of learning can cure stupidity, and higher education positively fortifies it."
    - Stephen Vizinczey