run jar-file on startup linux - linux

Question

I've used a standard bash-startup script for autostarting my Teamspeak Server - which works perfectly. Now I've done the same for the JTS3 Server Mod, problem: It's a .jar-file and doesn't start. If I run the .jar/startscript manually it works just fine.
Here's the script in /etc/init.d/
#!/bin/bash
### BEGIN INIT INFO
# Provides: jts3servermod
# Required-Start: $local_fs $network
# Required-Stop: $local_fs $network
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Description: JTS3 Server Mod
### END INIT INFO
# INIT Script by www.SysADMINsLife.com
######################################
# Customize values for your needs: "User"; "DIR"
USER="ts"
DIR="/home/ts/JTS3ServerMod"
###### Teamspeak 3 server start/stop script ######
case "$1" in
start)
su $USER -c "${DIR}/jts3servermod_startscript.sh start"
;;
stop)
su $USER -c "${DIR}/jts3servermod_startscript.sh stop"
;;
restart)
su $USER -c "${DIR}/jts3servermod_startscript.sh restart"
;;
status)
su $USER -c "${DIR}/jts3servermod_startscript.sh status"
;;
*)
echo "Usage: {start|stop|restart|status}" >&2
exit 1
;;
esac
exit 0
of course it is linked in the runlevel-folders with update-rc.d jts3servermod defaults.
the servermod startscript (jts3servermod_startscript.sh) is:
#!/bin/sh
# JTS3ServerMod Linux start script
# Created by Stefan "Stefan1200" Martens
# The author of this script is not responsible for any damage or data loss!
JAVA_COMMANDLINE_PARAMETERS="-mx30M" # You can add java arguments here, like the -mx30M argument!
JTS3SERVERMOD_COMMANDLINE_PARAMETERS="" # You can add JTS3ServerMod arguments here, like the -config and -log argument!
BINARYPATH="$(pwd)" # This have to point to the JTS3ServerMod directory!
# Don't change the lines below, if you are not a sh script expert!
cd "${BINARYPATH}"
BINARYNAME="JTS3ServerMod.jar"
ROOTUID="0"
case "$1" in
java)
if which java >/dev/null 2>&1 ; then
echo "Java is already installed:"
java -version
else
if [ "$(id -u)" -ne "$ROOTUID" ] ; then
echo "Start this script as root to start the automatic installation of the Java runtime environment."
echo "You can also read the system requirements of the JTS3ServerMod in the readme.txt file for a manual installation of the Java runtime environment."
exit 6
else
read -p "Do you wish to install the Java runtime environment? (y/n) " yn
case $yn in
[Yy]* ) installJava; break;;
* ) echo "Aborted!"; exit 6;;
esac
fi
fi
;;
start)
if ! which java >/dev/null 2>&1 ; then
echo "The JTS3ServerMod needs the Java runtime environment installed to run!"
echo "Start this script with the java argument as root to start the automatic installation of the Java runtime environment:"
echo "$0 java"
echo "You can also read the system requirements of the JTS3ServerMod in the readme.txt file for a manual installation of the Java runtime environment."
exit 6
fi
if [ "$(id -u)" -eq "$ROOTUID" ] ; then
echo "For security reasons it is prefered not to run the JTS3ServerMod as root!"
fi
if [ -e jts3servermod.pid ]; then
if ( kill -0 $(cat jts3servermod.pid) 2> /dev/null ); then
echo "The JTS3ServerMod is already running, try restart or stop!"
exit 1
else
echo "jts3servermod.pid found, but no JTS3ServerMod running. Possibly your previously started JTS3ServerMod crashed!"
echo "Please view the logfile for details."
rm -f jts3servermod.pid
fi
fi
echo "Starting the JTS3ServerMod..."
if [ -e "$BINARYNAME" ]; then
java ${JAVA_COMMANDLINE_PARAMETERS} -jar ${BINARYNAME} ${JTS3SERVERMOD_COMMANDLINE_PARAMETERS} > /dev/null &
PID=$!
ps -p ${PID} > /dev/null 2>&1
if [ "$?" -ne "0" ]; then
echo "JTS3ServerMod could not start!"
else
echo $PID > jts3servermod.pid
echo "JTS3ServerMod started, for details please view the log file!"
fi
else
echo "Could not find the file $BINARYNAME, aborting!"
exit 5
fi
;;
stop)
if [ -e jts3servermod.pid ]; then
echo -n "Stopping the JTS3ServerMod.."
if ( kill -TERM $(cat jts3servermod.pid) 2> /dev/null ); then
c=1
while [ "$c" -le 120 ]; do
if ( kill -0 $(cat jts3servermod.pid) 2> /dev/null ); then
echo -n "."
sleep 1
else
break
fi
c=$(($c+1))
done
fi
if ( kill -0 $(cat jts3servermod.pid) 2> /dev/null ); then
echo "JTS3ServerMod is not shutting down cleanly - killing!"
kill -KILL $(cat jts3servermod.pid)
else
echo "done"
fi
rm -f jts3servermod.pid
else
echo "No JTS3ServerMod running (jts3servermod.pid is missing)!"
exit 7
fi
;;
restart)
$0 stop && $0 start || exit 1
;;
status)
if [ -e jts3servermod.pid ]; then
if ( kill -0 $(cat jts3servermod.pid) 2> /dev/null ); then
echo "JTS3ServerMod is running!"
else
echo "JTS3ServerMod seems to have died!"
fi
else
echo "No JTS3ServerMod running (jts3servermod.pid is missing)!"
fi
;;
*)
echo "Usage: ${0} {start|stop|restart|status|java}"
exit 2
esac
exit 0
I also tried to write an own simple script for only starting the jar and catching the pid and writing it into a file.
None of these scripts wanted to start my .jar file during the startup.
As you can see, the first script is a template for starting Teamspeak Servers during boot. I only replaced some stuff with my Server Mod paths and scripts and put into /etc/init.d/ (chmod 755 was executed of course).
Maybe some of you have other approaches to solve that strange circumstances.

Answer 1

I don't know if the problem was solved in the meantime, but while experimenting with the same issue. I figured out that the script could not find the jar file. So I added:
#!/bin/sh
# JTS3ServerMod Linux start script
# Created by Stefan "Stefan1200" Martens
# The author of this script is not responsible for any damage or data loss!
cd "$(dirname "$0")"
...
At the beginning of the jts3servermod_startscript.sh to ensure that the "working directory" is correct.
BTW - My init script:
jts-bot
#!/bin/sh
### BEGIN INIT INFO
# Provides: jts-bot
# Required-Start: $local_fs $network
# Required-Stop: $local_fs $network
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Description: JTS3-Bot for TeamSpeak
### END INIT INFO
USER="teamspeak"
DIR="/home/teamspeak/JTS3ServerMod"
###### JTS3ServerMod start/stop script ######
case "$1" in
start)
su $USER -c "${DIR}/jts3servermod_startscript.sh start"
;;
stop)
su $USER -c "${DIR}/jts3servermod_startscript.sh stop"
;;
restart)
su $USER -c "${DIR}/jts3servermod_startscript.sh restart"
;;
status)
su $USER -c "${DIR}/jts3servermod_startscript.sh status"
;;
*)
echo "Usage: -bash {start|stop|restart|status}" >&2
exit 1
;;
esac
exit 0