Watchdog script that is meant to run in most *nix environments

watchdog.sh

#!/bin/bash
#
# Watchdog Script
#
# This script is meant to be run as a cron job. This needs to be run as root or a user
# that can start system services.
#
# It looks to see if $NAME is running. If $NAME is not running then it attempts to start
# the process and send notifications.
#
# Original script found at 
# http://blog.eracc.com/2010/05/08/linux-monitor-a-service-with-a-watchdog-script/

NAME=processd
START=/path/to/start/$NAME

NOTIFY=person1@example.com
NOTIFYCC=person2@example.com

PS=`which ps`
GREP=`which grep`
NOP=`which true`
DATE=`which date`
MAIL=`which mail`
RM=`which rm`

$PS -ef|$GREP -v grep|$GREP $NAME >/dev/null 2>&1
case "$?" in
  0)
    $NOP
    ;;
  1)
    NOTICE=/tmp/watchdog.txt
    echo "[`$DATE`] $NAME is not running" | tee $NOTICE
    
    echo "[`$DATE`] Attempting to start $NAME" | tee -a $NOTICE
    if $START 2>&1 >/dev/null
    then
      echo "[`$DATE`] $NAME has been successfully started" | tee -a $NOTICE
    else
      echo "[`$DATE`] $NAME has failed to start" | tee -a $NOTICE
    fi
    
    $MAIL -n -s "$NAME Process Watchdog Notice" -c $NOTIFYCC $NOTIFY < $NOTICE
    $RM -f $NOTICE
    ;;
esac

exit