Executes the command provided as argument and respawns it if it got terminated.

respawn.sh

#!/bin/sh

# Executes the command provided as argument and respawns it if it got
# terminated.
#
# Licensed under CC0 <https://creativecommons.org/publicdomain/zero/1.0/>

$@ &
PID=$!
while :
do
  sleep 1
  if ! ps -p $PID > /dev/null; then
    $@ &
    PID=$!
  fi
done