A simple script for determining whether a process is running on the local system.

is_process_running.sh

is_process_running() {
  if [ -z "$1" ]; then
    write_error "shared_functions" "The process ID was not defined as the first parameter."
  fi
  if ps -p $1 >/dev/null; then
    return 0
  fi

  return 1
}

if is_process_running 123; then
  echo "123 is running"
fi