Shell Programming and Scripting

SCRIPT=$(basename "$0")
VERSION='$Revision: 6327 $'
VERBOSE=0
NUMBITS=0
YES=0
# , support version specification
function usage {
  cat << EOM
usage: $SCRIPT [-h] [-v] [-V] [-b] [-y]
  where:
    -b bits java bit level 32 or 64
    -h show this message and exit
    -v add verbosity
    -V show version and exit
    -y answer prompts with yes
EOM
        exit 1
}
while getopts ":b:hvVy" opt
do
  case "$opt" in
    b ) NUMBITS=$OPTARG ;;
    h )
      usage
      ;;
    v ) ((VERBOSE+=1)) ;;
 V )    
      echo "$SCRIPT VERSION: $(echo $VERSION | awk '{ print $2 }')"
      exit 0
      ;;
    y ) YES=1 ;;
    * )
      echo "Unexpected option \"$opt\""
      usage
      ;;
  esac
done
shift $(($OPTIND - 1))
# Dependencies:
for DEPENDENCIES in symlink-resolve
do
  if ( which $DEPENDENCIES 2>&1 | grep -e "^which: no " -e "^no ")
  then
    echo "Aborting - unable to resolve dependency: $DEPENDENCIES"
    exit 1
  fi
done
unset DEPENDENCIES
case "$NUMBITS" in
  32|64)
  ;;
  *)
    echo "Invalid bits specified: $NUMBITS"
    usage
  ;;
esac
SHARE=/app/share/java/bin
JAVASHARE=${SHARE}/java
if [ -L "$JAVASHARE" ]
then
# if YES is 0, prompt user asking if instances are stopped
#              if answer is no exit
read -y " Did you stop all instances before this? [y/n] answer
if [ $answer != [-y] ]
then
echo "Cannot proceed becuases instances not stopped" exit
else
echo "Current Java Version running on machine is: $(java -version)
fi
# Is current version what we want?
# If yes say so and exit
read -y "Is this version of Java the current version you want? [y/n]" answer
if [ $answer =! [-y] ]
then exit
else
read -b "Please choose which bit version you want Java at? [32/64]" NUMBITS
if [ $NUMBITS =! [-b] ]
then setServerJava -b $NUMBITS
fi
fi
JAVACUR=$(symlink-resolve $JAVASHARE)
# test and make sure it is directory
# extract the bits from the current
#OLDBITS
  JAVAP=$(basename $JAVACUR)
  JAVAN=$(echo "$JAVAP" | sed -e "s/$OLDBITS/$NUMBITS/")
  JAVANEW=${SHARE}/${JAVANEW}
  # test is dir JAVANEW error exit if not
  cd $SHARE
  rm $JAVASHARE
  ln -s $JAVANEW $JAVASHARE
  # darn I am good

else
  echo "Symlink not found: $JAVASHARE"
fi

read var1?"Prompting text : "

[otto@centosgeek ~]$ a="-y";if [ $a = [-y] ]
> then
>     echo $a
> else
>     echo boo
> fi
boo
[otto@centosgeek ~]$ a="-y";if [ $a = "-y" ]
> then 
>     echo $a
> else 
>     echo boo
> fi
-y
[otto@centosgeek ~]$

[otto@centosgeek ~]$ read -b "Please choose which bit version you want Java at? [32/64]" NUMBITS
bash: read: -b: invalid option
read: usage: read [-ers] [-a array] [-d delim] [-i text] [-n nchars] [-N nchars] [-p prompt] [-t timeout] [-u fd] [name ...]
[otto@centosgeek ~]$

if [ $NUMBITS =! [-b] ]
then setServerJava -b $NUMBITS
fi

if [ $NUMBITS =! [-b] ]
then 
      setServerJava -b $NUMBITS
fi