keepalive.rb

$stdout.sync = true
cmd = ARGV.join " "
 
puts "going to execute: #{cmd}"
puts "note: I'll retry the command endlessly, regardless of exit status."
puts "I will, however, wait 5 seconds before restarting to give you time"
puts "to kill me and not my subprocess"
 
loop do
  system cmd
  print "command terminated. sleeping... "
  sleep 5
  puts "restarting"
end