init_template.sh

#!/bin/bash
# app-name daemon
# chkconfig: 345 20 80
# description: app-name daemon
# processname: process_name

# This init.d script makes twp assumptions
# 1) The script is run by root. Only root has the rights to su to the RUNTIME_USER.
# 2) The RUNTIME_USER a system user. Any user should work, so long as they have permissions to the project files.

NAME="app-name"
DESC="app-name daemon"
RUNTIME_USER="username"
SRC_PATH="/working/directory/for/app-name"
START_CMD="/path/to/executable --argument1 --argument2"
RELOAD_CMD="/path/to/executable --argument1 --argument2"
PROCMATCH="searchable process string"
PID="$(pgrep -f "${PROCMATCH}")"

case "$1" in
  start)
    if [[ ! $(id -u) -eq 0 ]]; then
      echo "The ${NAME} service must be started as root!"
      exit 1
    fi
    if [[ "${PID}" ]]; then
      echo "${NAME} already running, PID: ${PID}"
    else
      printf "%-40s\n" "Starting ${NAME}..."
      su ${RUNTIME_USER} bash -c "cd ${SRC_PATH}; ${START_CMD}"
      PID="$(pgrep -f "${PROCMATCH}")"
      if [[ "${PID}" ]]; then
        echo "${NAME} running, PID: ${PID}"
      else
        printf "-40%s\n" "Unable to start ${NAME}"
        exit 1
      fi
    fi
  ;;
  reload)
    if [[ ! $(id -u) -eq 0 ]]; then
      echo "The ${NAME} service must be reloaded as root!"
      exit 1
    fi
    else
      printf "%-40s\n" "Reloading ${NAME}..."
      su ${RUNTIME_USER} bash -c "${RELOAD_CMD}"
      if [[ $? -eq 0 ]]; then
        echo "${NAME} reloaded"
      else
        printf "-40%s\n" "Unable to reload ${NAME}"
        exit 1
      fi
    fi
  ;;
  status)
    printf "%-40s\n" "Checking ${NAME}..."
    if [[ "${PID}" ]]; then
      echo "${NAME} running, PID: ${PID}"
    else
      printf "%-40s\n" "Service not running"
      exit 1
    fi
  ;;
  stop)
    if [[ ! $(id -u) -eq 0 ]]; then
      echo "The ${NAME} service must be stopped as root!"
      exit 1
    fi
    printf "%-40s\n" "Stopping ${NAME}, PID: ${PID}"
    kill "${PID}"
    if [[ $(pgrep -f "${PROCMATCH}") ]]; then
      printf "%-40s" "${NAME} still running. Attempting hard stop."
      kill -9 "${PID}"
      if [[ $(pgrep -f "${PROCMATCH}") ]]; then
        printf "%-40s\n" "Unable to stop ${NAME}"
      else
        printf "%-40s\n" "${NAME} stopped"
      fi
    else
      printf "%-40s\n" "${NAME} stopped"
    fi
  ;;

  restart)
    $0 stop
    $0 start
  ;;

  *)
    echo "Usage: $0 {status|start|stop|reload|restart}"
    exit 1
  ;;
esac