Subjectively

#!/bin/bash
 
# put these lines in the file header comment
#          FILE:  |FILENAME|
#         USAGE:  ./|FILENAME| start [ stop | restart ] [ --nofork ] [ --debug ]
 
#-----------------------------------------------------------------------
#Uncomment the following line to echo all commands to the terminal
#-----------------------------------------------------------------------
#set -x
# better yet, set the --debug command line flag and syslog it.
 
#-----------------------------------------------------------------------
#  Check number of command line arguments
#-----------------------------------------------------------------------
[[ $# -lt 1 ]] || [[ $# -gt 3 ]] && {
  echo -e "\tUsage:  ${0##/*/} start [ | stop | restart ] [ --nofork ] [ --debug ]"
  exit 1
  }
 
#A launchd script in OSX is not supposed to fork
nofork=`echo "$*" | grep "\-\-nofork"`
[[ ! -z $nofork ]] && nofork=true
[[ -z $nofork ]] && nofork=false
#check to send everything to syslog
debug=`echo "$*" | grep "\-\-debug"`
[[ ! -z $debug ]] && debug=true
[[ -z $debug ]] && debug=false
 
#configuration
basename="`basename $0 .sh`"
# look for the conf file in the same folder as the script
conf="`dirname $(which $0)`/${basename}.conf" #<-- which handles "bash -x $0 start"
[[ -f "$conf" ]] && source "$conf"
whoiam=`whoami` 
# create a pid file with the pid of the process on the first line 
pidfile="/tmp/${basename}.pid" 
[[ $whoiam == 'root' ]] && pidfile="/var/run/${basename}.pid"  
#find the temp directory 
tempfile=`mktemp -t j` 
#put all of your incidentals in the tempdir 
tempdir=`dirname $tempfile` 
rm $tempfile 
#Do all further processing from the root 
cd / 
# Load the daemon template for OSX 
. /etc/rc.common 
#traps trap 'source $conf' 1  
# response to kill -s HUP $$ should be to read the config file. 
#trap 'echo trap  0; rm -f "$pidfile"; exit'  0     #can't trap this, daemon will exit when parent dies. 
trap 'echo trap  3; rm -f "$pidfile"; exit'  3 15     #clean up the pidfile 
[[ "$debug" == "true" ]] && trap 'logger -t $0 -i -- $USER : $BASH_COMMAND' DEBUG #syslog everything if we're debugging 
trap 'logger -t $0 -i -- $USER : $BASH_COMMAND' ERR  #log errors regardless 
#===  FUNCTION  ================================================================ 
#          NAME:  main 
#   DESCRIPTION:  Allows daemon to be run in background 
#    PARAMETERS:  none 
#       RETURNS:  void 
#=============================================================================== 
function main() { 
#         Put your service code here 
while : # Loop forever 
do
   sleep 10
   echo $RANDOM
done 
} 
#===  FUNCTION  ================================================================ 
#          NAME:  StartService 
#   DESCRIPTION:  implements function from /etc/rc.common 
#    PARAMETERS:  none 
#       RETURNS:  void 
#=============================================================================== 
StartService () {   
CheckForNetwork   
[[ -f $pidfile ]] && {
     pid=`head -n 1 $pidfile`
     procname=`ps awx | awk "\\\$1 == $pid { print \\\$7 }"`
     [[ ! -z $procname ]] && [[ "$procname" == "$0" ]] && {
         echo "$basename is already running"
         exit 1
     }
     rm $pidfile
   }
   # do the service
   #   no fork method for launchd service   
[[ "$nofork" == "true" ]] && {
       #pid file with this process id
       echo $$ > $pidfile
      main
      exit
  }
 
  # fork and exit
  main &
  # create a pid file with the pid of the child
  #  the parent will go away and leave the child owned by init
  echo $! > $pidfile
 
}
 
#===  FUNCTION  ================================================================
#          NAME:  StopService
#   DESCRIPTION:  implements the function from /etc/rc.common
#    PARAMETERS:  none
#       RETURNS:  void
#===============================================================================
StopService ()
{
  [[ -f $pidfile ]] && {
    kill `head -n 1 $pidfile`
    rm $pidfile
  }
  #touch "$quit"
}
 
#===  FUNCTION  ================================================================
#          NAME:  RestartService
#   DESCRIPTION:  implements the function from /etc/rc.common
#    PARAMETERS:  none
#       RETURNS:  void
#===============================================================================
RestartService ()
{
  StopService
  StartService
}
 
#-------------------------------------------------------------------------------
#  Call the function declared in /etc/rc.common to daemonize process
#-------------------------------------------------------------------------------
RunService "$1"  #First parameter is start/stop/restart