Was looking around to find a simple method to find the fullpath or explicit path for the script running.
After a while of searching I found this useful simple snippet: bash, full filename.
And used it like this in the beginning of the script:

PRG="$0"
OLDPWD=`pwd`
B=`basename $PRG`
P=`dirname $PRG`
#  echo BASE:$B  PATH:$P
cd $P
if [ `pwd` != "/" ]
then
FULLNAME=`pwd`/$B
else
FULLNAME=/$B
fi
echo $FULLNAME
cd $OLDPWD
echo `pwd`

… simple but effectiv.