Warning msg from .sh script to web user?


 
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# 1  
Warning msg from .sh script to web user?

Hello out there,
I got a script that stops and restarts a webapp. I would like to be able to send warning reminders to the webusers as a warning like 5 minutes before it happens. Can I do this an if so how?
# 2  
Certainly it's possible in any number of ways.

One way might be to use a flag-file.

Code:
#!/bin/sh

FLAG="/tmp/myapp-notify"

# Remove the file when the restart script quits
trap "rm -f $FLAG" EXIT

touch "$FLAG" || exit

sleep 300

restart_app

Your webapp would check for the existence of /tmp/myapp-notify and, if it exists, warn users the system will be restarted soon.
 

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