Run non-terminating commands with the ability to force restart them

loop-command

#!/bin/bash

# Validate argument exists
if [ -z "$1" ] 
then
  echo "No command specified."
  echo "Usage: loop-command (command)"
  exit 1
fi 
# Get command from first argument
child_command="$1"

# Preamble
echo "   --- Command Looper by Peabnuts123 ---  "
echo "*** Press Ctrl+C once to restart the command"
echo "*** Press Ctrl+C twice in succession to exit"
sleep 3

# Release SIGINT trap, sleep, giving the user
#   the opportunity to SIGINT again
function restart_or_kill() {
  trap - INT
  echo "*** Send another SIGINT to exit"
  sleep 1
}

# Loop!
while true
do
  echo "*** Executing \`${child_command}'..."
  trap restart_or_kill INT
  eval $child_command
done