[htdig] HTDIG ::: A Fedora & centos service shell script for /etc/init.d/ so that a user can start and stop htdig as a service

[mark ---- <mar...@ho...>]

Hi 


This is a shell script I wrote to start and stop htdig when it is running on a fedora or Centos or redhat 
linux machine.


This was not an easy script to write htdig is a very noisy program to kill from a bash script which made
it very difficult to kill . Which made it very difficult to get to work with the Fedora service script system.


The issue solved were kill -9 pid   returning "Killed" or "terminated".  You can not trap a SIGINT signal 
ie -9 where as you can trap a SIGTERM signal from pkill


Please include this script in future releases of  htdig and install it into /etc/init.d from the make  install
process.


Best wishes 


Mark  Adam Tkac <atkac@redhat com>




Here is the script 


#!/bin/sh 
#
# htdig: 345 81 35
# description: Starts and stops the htdig search engine

# Source function library.
. /etc/rc.d/init.d/functions   ### This library is called from 

# See how we were called.
case "$1" in
  start)
	echo -n "Starting htdig search engine  : "
	rundig=$(pgrep rundig)  # find all the process
	if [ -z "$rundig" ]  	# check that another instants of rundig is not running before 
	then 			# before running rundig
		rundig& 	# rundig as a background task.
	fi
	
	echo "OK"
	;;
	
  stop)
	echo -n "Stopping htdig search engine : "

	# Notes
	# ===== 
	# this checks to see is there is a pid process number for the process say "rundig"
	# if there is a process it kills it off
	# send annoying "killed" or "terminated messages to junk bin  { comand } 2>/dev/null
	# then the final
	
	rundig=$(pgrep rundig)  # find all the process 
	htdig=$(pgrep htdig)
	htmerge=$(pgrep htmerge)
	htnotify=$(pgrep htnotify)
	htfuzzy=$(pgrep htfuzzy)
	
	
	# check the process has a PID job number and if it does kill it quitely
	
	if [ "$rundig" ] ;then trap " $(pkill rundig | 2>/dev/null )" SIGTERM ;fi
	if [ "$htdig" ]; then trap " $(pkill htdig | 2>/dev/null )" SIGTERM ;fi
	if [ "$htmerge" ]; then trap " $(pkill htmerge | 2>/dev/null )" SIGTERM ;fi
	if [ "$htnotify" ]; then trap " $(pkill htnotify | 2>/dev/null)" SIGTERM ;fi
	if [ "$htfuzzy" ]; then trap " $(pkill htfuzzy | 2>/dev/null)" SIGTERM ;fi
	

	echo "OK"
	;;
  
  #status)
  #	echo ""
  #;;
  restart)
	echo -n "Restarting htdig search engine : "
	echo  " "
	echo -n "Stopping htdig search engine : "
	rundig=$(pgrep rundig)  # find all the process 
	htdig=$(pgrep htdig)
	htmerge=$(pgrep htmerge)
	htnotify=$(pgrep htnotify)
	htfuzzy=$(pgrep htfuzzy)
	# check the process has a PID job number and if it does kill it quitely
	if [ "$rundig" ] ;then trap " $(pkill rundig | 2>/dev/null )" SIGTERM ;fi
	if [ "$htdig" ]; then trap " $(pkill htdig | 2>/dev/null )" SIGTERM ;fi
	if [ "$htmerge" ]; then trap " $(pkill htmerge | 2>/dev/null )" SIGTERM ;fi
	if [ "$htnotify" ]; then trap " $(pkill htnotify | 2>/dev/null)" SIGTERM ;fi
	if [ "$htfuzzy" ]; then trap " $(pkill htfuzzy | 2>/dev/null)" SIGTERM ;fi
	echo "OK"
	echo -n "Starting htdig search engine  : "
	rundig&
	echo "OK"


	echo -n " Restart complete done."
	;;
  *)
	echo "Usage: htdig search engine {start|stop|restart}"
	exit 1
esac