Call the script after disconnecting from server

Question

I have a script I made for work that will call a function that takes an argument. I use the arguments to ssh into our servers. My question is: Is there a way to call the method so that if/when I get disconnected from our servers, It will automatically call the script? So for example, I can ssh into one of our servers. We have a reverse-ssh tunnel set up so after an hour the connection closes. I want it so that after the disconnection, the script will be called again prompting for a hostname.

#!/bin/bash
echo "Provide hostname: "
read host

createSSHFunction()
{
    arg1=$1
    ssh $host
}
createSSHFunction $host

Answer 1

Recursion is rarely the answer to anything :-)

What you are trying to do can be done via a simple loop

while :; do
  ssh $host
done

Whenever ssh exits, the script will go to the next iteration of the loop, and re-execute it.

In while :, the : is a noop command that always returns a true value, so the while will never end. If you need some way of terminating the loop, you'll need to figure out what that criteria is, and test for it.

Answer 2

You'll need to loop infinitely, but prevent the script from running again when you are done.

while ((1)); do script.sh; sleep 3; done

The three second sleep gives you an opportunity to break the loop. When you're done with ssh, exit. In three seconds, the script will start again. If you don't want that to happen, Ctrl-C will stop the loop.