Skip keymon's force shutdown if runtime is already shutting down

[Aemiii91]

Keymon would force shutdown 30s after pressing the power button, and this would interrupt any scripts running during shutdown. This changes the keymon logic to skip the force shutdown, if the device is already in the process of shutting down.

[XK9274]

Tested with below script:

#!/bin/sh

start_time=$(date +%s)

while true; do
    current_time=$(date +%s)
    elapsed_time=$((current_time - start_time))

    echo "Script has been running for $elapsed_time seconds."

    if [ $elapsed_time -ge 85 ]; then
        echo "Script has completed its 85-second runtime."
        break
    fi

    sleep 1
done

Producing the below output:

mv: can't rename '/tmp/cmd_to_run.sh': No such file or directory
Script has been running for 0 seconds.
Script has been running for 1 seconds.
Script has been running for 3 seconds.
Script has been running for 4 seconds.
Script has been running for 5 seconds.
...
Script has been running for 81 seconds.
Script has been running for 82 seconds.
Script has been running for 83 seconds.
Script has been running for 84 seconds.
Script has been running for 85 seconds.
Script has completed its 85-second runtime.
<< Shutdown happens here
su: can't chdir to home directory '/home/root'
[1042] May 10 17:24:26 Early exit: Terminated by signal

Working as intended, thanks for your first ever contribution!