script to check if I the network is up or not

Scripting Forums AppleScript | Mac OS X
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#1

My server sends many emails via Applescript. But I get errors in Mail that the network is not available. I suspect the machine is sleeping and Mail tries to send the mail before a network connection is established, (hardwired).

I found the following script.

repeat until (do shell script "/sbin/ping -c1 www.google.com") contains "0% packet loss"
	delay 5 --  This will run the ping at 5 second intervals until there's no packet loss. 
end repeat

However, that does not seem to work properly. I explain. If I run it with a non-existing address, it does not keep running but sends the following error.

tell current application
	do shell script "/sbin/ping -c1 www.gle.com"
		--> error "PING www.gle.com (34.206.12.234): 56 data bytes

--- www.gle.com ping statistics ---
1 packets transmitted, 0 packets received, 100.0% packet loss" number 2
Result:
error "PING www.gle.com (34.206.12.234): 56 data bytes

--- www.gle.com ping statistics ---
1 packets transmitted, 0 packets received, 100.0% packet loss" number 2

The error box states:

PING www.gle.com (34.206.12.234): 56 data bytes

— www.gle.com ping statistics —
1 packets transmitted, 0 packets received, 100.0% packet loss

I discovered this as I get sometimes errors in the script running that point to this.

If I run it with the network disconnected, I get:

tell current application
	do shell script "/sbin/ping -c1 www.goole.com"
		--> error "ping: cannot resolve www.goole.com: Unknown host" number 68
Result:
error "ping: cannot resolve www.goole.com: Unknown host" number 68

I hope this is enough information for you to answer my query.

What I like to achieve is that it checks if I have a network connection and keeps doing so till it has that connection and then executes the rest of the script.

Any idea how to fix this?

PS OS10.15

#2

Here is a pic of the error.

https://ibb.co/mBFG0jP

#3

Other approach, using try block:


repeat
	try
		set pingRequest to do shell script "/sbin/ping -c1 www.goovcgle.com"
		if pingRequest contains "0% packet loss" then exit repeat
		-- This will run the ping at 5 second intervals until there's no packet loss. 
	on error
		display dialog "The connection is bad or is absent at all" giving up after 5
	end try
end repeat

This will keep executing of the script. It is infinitive loop, so you should connect to the Internet when it is OFF.

#4

thanks and it works.

there is a small error in the google line, here is the corrected version.

repeat
	try
		set pingRequest to do shell script "/sbin/ping -c1 www.google.com"
		if pingRequest contains "0% packet loss" then exit repeat
		-- This will run the ping at 5 second intervals until there's no packet loss. 
	on error
		display dialog "The connection is bad or is absent at all" giving up after 5
	end try
end repeat