#!/bin/sh
JAVA="`which java`"
CONFIGFILE="DATA/SETTINGS/yacy.conf"
LOGFILE="yacy.log"
PIDFILE="yacy.pid"
OS="`uname`"

#check if OS is Sun Solaris or one of the OpenSolaris distributions and use different version of id if necessary
if [ $OS = "SunOS" ]
then
    # only this version of id supports the parameter -u
    ID="/usr/xpg4/bin/id"
else
    # regular id for any other case (especially Linux and OSX)
    ID="id"
fi

if [ "`$ID -u`" -eq 0 ]
then
	echo
	echo "For security reasons you should not run this script as root!"
	echo
	exit 1
elif [ ! -x "$JAVA" ]
then
	echo "The java command is not executable."
	echo "Either you have not installed java or it is not in your PATH"
	#Cron supports setting the path in 
	#echo "Has this script been invoked by CRON?"
	#echo "if so, please set PATH in the crontab, or set the correct path in the variable in this script."
	exit 1
fi

usage() {
	cat - <<USAGE
startscript for YaCy on UNIX-like systems
Options
  -h, --help		show this help
  -t, --tail-log	show the output of "tail -f DATA/LOG/yacy00.log" after starting YaCy
  -l, --logging		save the output of YaCy to yacy.log
  -d, --debug		show the output of YaCy on the console
  -p, --print-out	only print the command, which would be executed to start YaCy
USAGE
}

#startup YaCy
cd "`dirname $0`"

options="`getopt -n YaCy -o h,d,l,p,t -l help,debug,logging,print-out,tail-log -- $@`"
if [ $? -ne 0 ];then
	exit 1;
fi

isparameter=0; #options or parameter part of getopts?
parameter="" #parameters will be collected here

LOGGING=0
DEBUG=0
PRINTONLY=0
TAILLOG=0
for option in $options;do
	if [ $isparameter -ne 1 ];then #option
		case $option in
			-h|--help) 
				usage
				exit 3
				;;
			-l|--logging) 
				LOGGING=1
				if [ $DEBUG -eq 1 ];then
					echo "can not combine -l and -d"
					exit 1;
				fi
				;;
			-d|--debug)
				DEBUG=1
				if [ $LOGGING -eq 1 ];then
					echo "can not combine -l and -d"
					exit 1;
				fi
				;;
			-p|--print-out)
				PRINTONLY=1
				;;
			-t|--tail-log)
				TAILLOG=1
				;;
		esac #case option 
	else #parameter
		if [ x$option = "--" ];then #option / parameter seperator
			isparameter=1;
			continue
		else
			parameter="$parameter $option"
		fi
	fi #parameter or option?
done

#echo $options;exit 0 #DEBUG for getopts

#get javastart args
JAVA_ARGS="-server -XX:+UseAdaptiveSizePolicy";
#JAVA_ARGS="-verbose:gc -XX:+PrintGCTimeStamps -XX:+PrintGCDetails $JAVA_ARGS";

#check if Linux system supports large memory pages or if OS is Solaris which 
#supports large memory pages since version 9 
#(according to http://java.sun.com/javase/technologies/hotspot/largememory.jsp)
ENABLEHUGEPAGES=0;

if [ $OS = "Linux" ]
then
    HUGEPAGESTOTAL="`cat /proc/meminfo | grep HugePages_Total | sed s/[^0-9]//g`"
    if [ -n "$HUGEPAGESTOTAL" ] && [ $HUGEPAGESTOTAL -ne 0 ]
    then 
        ENABLEHUGEPAGES=1
    fi
elif [ $OS = "SunOS" ]
then
	# the UseConcMarkSweepGC option caused a full CPU usage - bug on Darwin.
	# It was reported that the same option causes good performance on solaris.
    JAVA_ARGS="$JAVA_ARGS -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode"
    ENABLEHUGEPAGES=1
fi 

#turn on support for large memory pages if supported by OS
if [ $ENABLEHUGEPAGES -eq 1 ]
then
    JAVA_ARGS="$JAVA_ARGS -XX:+UseLargePages"
fi

if [ ! -f $CONFIGFILE -a -f DATA/SETTINGS/httpProxy.conf ]
then
	# old config if new does not exist
	CONFIGFILE="DATA/SETTINGS/httpProxy.conf"
fi
if [ -f $CONFIGFILE ]
then
	# startup memory
	for i in Xmx Xms; do
		j="`grep javastart_$i $CONFIGFILE | sed 's/^[^=]*=//'`";
		if [ -n $j ]; then JAVA_ARGS="-$j $JAVA_ARGS"; fi;
	done
	
	# Priority
	j="`grep javastart_priority $CONFIGFILE | sed 's/^[^=]*=//'`";

	if [ ! -z "$j" ];then
		if [ -n $j ]; then JAVA="nice -n $j $JAVA"; fi;
	fi

        PORT="`grep ^port= $CONFIGFILE | sed 's/^[^=]*=//'`";
	
#	for i in `grep javastart $CONFIGFILE`;do
#		i="${i#javastart_*=}";
#		JAVA_ARGS="-$i $JAVA_ARGS";
#	done
else
    JAVA_ARGS="-Xmx120m -Xms120m $JAVA_ARGS";
    PORT="8080"
fi

#echo "JAVA_ARGS: $JAVA_ARGS"
#echo "JAVA: $JAVA"

# generating the proper classpath
CLASSPATH=""
for N in lib/*.jar; do CLASSPATH="$CLASSPATH$N:"; done
for N in libx/*.jar; do CLASSPATH="$CLASSPATH$N:"; done
CLASSPATH="classes:.:htroot:htroot/api:$CLASSPATH"

cmdline="$JAVA $JAVA_ARGS -Djava.awt.headless=true -classpath $CLASSPATH yacy";
if [ $DEBUG -eq 1 ] #debug
then
	cmdline=$cmdline
elif [ $LOGGING -eq 1 ];then #logging
	cmdline="$cmdline >> yacy.log & echo \$! > $PIDFILE"
else
	cmdline="$cmdline >/dev/null 2>/dev/null & echo \$! > $PIDFILE"
fi
if [ $PRINTONLY -eq 1 ];then
	echo $cmdline
else
	echo "****************** YaCy Web Crawler/Indexer & Search Engine *******************"
	echo "**** (C) by Michael Peter Christen, usage granted under the GPL Version 2  ****"
	echo "****   USE AT YOUR OWN RISK! Project home and releases: http://yacy.net/   ****"
	echo "**  LOG of       YaCy: DATA/LOG/yacy00.log (and yacy<xx>.log)                **"
	echo "**  STOP         YaCy: execute stopYACY.sh and wait some seconds             **"
	echo "**  GET HELP for YaCy: see www.yacy-websearch.net/wiki and forum.yacy.de     **"
	echo "*******************************************************************************"
	echo " >> YaCy started as daemon process. Administration at http://localhost:$PORT << "
	eval $cmdline
	if [ "$TAILLOG" -eq "1" -a ! "$DEBUG" -eq "1" ];then
		sleep 1
		tail -f DATA/LOG/yacy00.log
	fi
fi