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Full Discussion: Using env variables to run a program
Top Forums Shell Programming and Scripting Using env variables to run a program Post 302887869 by Pherdinand on Tuesday 11th of February 2014 09:56:30 AM
Old 02-11-2014
That shouldn't be the problem in the long run.

But I still don't understand how this script is limited to only that one server, as I understand so little of what it does.

I understand that it checks for a symbolic link in the beginning, but everything else in the first while is lost on me.

The first thing I understand after that is when it sets the Java homedir.

Everything after that is lost on me again.

---------- Post updated at 03:56 PM ---------- Previous update was at 03:49 PM ----------

I found an older version of the script, not yet fitted to that server:

Code:
#!/bin/sh

# resolve links - $0 may be a softlink
PRG="$0"

while [ -h "$PRG" ]; do
  ls=`ls -ld "$PRG"`
  link=`expr "$ls" : '.*-> \(.*\)$'`
  if expr "$link" : '/.*' > /dev/null; then
    PRG="$link"
  else
    PRG=`dirname "$PRG"`/"$link"
  fi
  echo "PRG = $PRG"
done


# Get standard environment variables
PRGDIR=`dirname "$PRG"`

# Only set $CT_HOME if not already set
# [ -z "CT_HOME" ] && CT_HOME=`cd "$PRGDIR/.." ; pwd`
CT_HOME=`cd "$PRGDIR/.." ; pwd`


# Make sure prerequisite environment variables are set
if [ -z "$JAVA_HOME" ]; then
  # For our servers we assume our standard jdk location
  if [ -d "/spd/iu/system/java/jdk1.6.0_65" ]; then
    JAVA_HOME="/spd/iu/system/java/jdk1.6.0_65"
    echo "Setting JAVA_HOME to $JAVA_HOME"
  else
    echo "Please set JAVA_HOME variable to a JDK >= 1.6.x"
    exit 1
  fi
fi

_RUNJAVA="$JAVA_HOME"/bin/java

# Set classpath
CLASSPATH="$CT_HOME"
CT_LIBDIR="$CT_HOME/lib"
if [ -d "${CT_LIBDIR}" ]; then
  for i in "${CT_LIBDIR}"/*.jar; do
    CLASSPATH="$CLASSPATH":"$i"
  done
else
  echo "Does not exist: ${CT_LIBDIR}"
fi

echo "CLASSPATH = ${CLASSPATH}"

$_RUNJAVA -cp ${CLASSPATH} com.luz.telco.sandbox.tecon.ConnectionTest $@

 

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LEARN ABOUT DEBIAN

airport2-portinspector

AIRPORT2-PORTINSPECTOR(1)				      General Commands Manual					 AIRPORT2-PORTINSPECTOR(1)

NAME

       airport2-portinspector - Port maps inspector for the Apple AirPort Extreme Base Station ("Snow")

SYNOPSIS

       airport2-portinspector

DESCRIPTION

       airport2-portinspector allows you to inspect the port maps used by the hosts associated with your base station.

OPTIONS

       airport2-portinspector  accepts	no  command-line options. airport2-portinspector is a wrapper script around the PortInspector.jar jar file
       located in /usr/share/java/airport-utils.

       You can set the JAVACMD environment variable to use a specific JVM instead of the one chosen by the wrapper script. Set the DEBUG  environ-
       ment variable to 1 to get the debug output from the wrapper script.

ENVIRONMENT VARIABLES

       DEBUG  Set this variable to 1 to get the debug output from the wrapper script.

       JAVACMD
	      The  full  path  to  the	Java  Virtual  Machine	to  use.  By  default,	the  wrapper  uses JAVACMD; if it is not set, it looks for
	      JAVA_BINDIR/java, then for JAVA_HOME/bin/java before looking for a java executable in the PATH. In the latter case, the JVM used can
	      be configured using the Debian alternatives system (see update-alternatives(8)).

       JAVA_HOME
	      The full path where your JDK/JRE is installed.

       JAVA_BINDIR
	      The full path to the directory where the java executable is located.

       JAVA_ARGS
	      Extra command-line arguments to be passed to the Java Virtual Machine.

AUTHOR

       airport2-portinspector was written by Jon Sevy <jsevy@cs.drexel.edu>.

       This manual page was written by Julien BLACHE <jblache@debian.org>, for the Debian project (but may be used by others).

								   May 20, 2006 					 AIRPORT2-PORTINSPECTOR(1)
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