Shell Programming and Scripting

 
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

read -v "Did you stop all instances before this? [y/n]" answer
if [ $answer != [-y] ]
then
  echo -h "Cannot proceed because instances not stopped"
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 -v "Is this version of Java the current version you want? [y/n]" answer
if [ $answer = [-y] ]
then
  exit
else
read -v "Please choose which bit version you want Java at? [32/64]" NUMBITS
if [ $NUMBITS = [-b] ]
then
  setServerJava -b $NUMBITS
fi

Last login: Fri Jul  5 20:14:24 on ttys000
AMIGA:barrywalker~> ksh
AMIGA:uw> printf "Type in your name: "; read name
Type in your name: Barry
AMIGA:uw> echo "$name"
Barry
AMIGA:uw> exit
AMIGA:barrywalker~> _

Last login: Fri Jul  5 20:31:50 on ttys000
AMIGA:barrywalker~> ksh
AMIGA:uw> echo -n "Type in your name: "; read name
Type in your name: Barry
AMIGA:uw> echo "$name"
Barry
AMIGA:uw> exit
AMIGA:barrywalker~> _

#!/bin/ksh
SCRIPT=${0##*/}
VERSION=0.2
function usage {
  cat << EOM
usage: $SCRIPT [-b bits] [-h] [-v] [-V] [-y]
  where:
    -b bits     java bit level (32 or 64)
    -h          show this message and exit
    -v          add verbosity
    -V          show version and exit
    -y          answer prompts with yes
EOM
  exit 1
}
while getopts "b:hvVy" opt
do
  case "$opt" in
    (b) NUMBITS=$OPTARG ;;
    (h) usage ;;
    (v) ((VERBOSE+=1)) ;;
    (V) echo "$SCRIPT VERSION: $VERSION"
        exit 0 ;;
    (y) YES=1 
        echo "$SCRIPT: -y option not yet implemented."
        exit 1 ;;
    (*) usage ;;
  esac
done
shift $(($OPTIND - 1))
printf "NUMBITS=%s, VERBOSE=%d, YES=%d\n" "$NUMBITS" "$VERBOSE" "$YES"
# Dependencies:
for DEPENDENCIES in java setServerJava # symlink-resolve
do
  if ! which $DEPENDENCIES >/dev/null 2>&1
  then
    echo "Aborting - unable to resolve dependency: $DEPENDENCIES"
    exit 1
  fi
done
unset DEPENDENCIES
  
read answer?"Did you stop all instances before this? [y/n] "
if [ "$answer" != y ]
then
  echo "Cannot proceed because instances not stopped"
  exit 1
fi
echo "Current Java Version running on machine is:"
java -version

# Is current version what we want?
# If yes say so and exit
read answer?"Is this version of Java the current version you want? [y/n] "
if [ "$answer" = y ]
then
  exit
fi
if [ -z "$NUMBITS" ]
then
  read NUMBITS?"Please choose which bit version you want Java at? [32/64] "
fi
if [ "$NUMBITS" != 32 ] && [ "$NUMBITS" != 64 ]
then
  echo "$SCRIPT: bit version must be 32 or 64; not $NUMBITS."
  usage
fi
echo "Setting bit version to $NUMBITS."
setServerJava -b $NUMBITS

SCRIPT=$(basename "$0")
VERSION='$Revision: 6327 $'
VERBOSE=0
NUMBITS=0
YES=0
 
function usage {
  cat << EOM
usage: $SCRIPT [-h] [-v] [-V] [-b bits] [-y]
  where:
    -b bits   java bit level 32 or 64
    -h        show this message and exit
    -v        add verbosity
    -V        show version and exit
    -y        answer prompts with yes
EOM
        exit 1
}
while getopts ":b:hvVy" opt
do
  case "$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))
 
printf "NUMBITS=%s, VERBOSE=%d, YES=%d\n" "$NUMBITS" "$VERBOSE"
 
# 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: $NUMBITS"
    usage
  ;;
esac
SHARE=${SCRDIR}/app/share
JAVASHARE=${SHARE}/java/bin/java
 
# if YES is 0, prompt user asking if instances are stopped
# if answer is no exit
if [ -L $JAVESHARE ]
  then
read ANSWER?"Did you stop all instances before this? [yes/no] "
  if [[ $ANSWER != @([yes])* ]]
then
  echo "Cannot proceed because instances not stopped." & exit 1
  fi
fi
 
# Is current version what we want?
# If yes say so and exit
read ANSWER?"Is this version of Java the current version you want? [yes/no]"
if [[ $ANSWER = @([yes])* ]]
 then
      echo "Setting Java to: $NUMBITS"
  usage
fi
setServerJava -b $NUMBITS
 
if [ $VERBOSE -ne 0 ]
then
  echo "NUMBITS: $NUMBITS"
fi
 
JAVACUR=$(symlink-resolve $JAVASHARE)
# test and make sure it is directory
 
if [ $JAVACUR = $JAVASHARE ]
then
  exit 1
fi
 
# extract the bits from the current
$(basename (symlink-resolve /app/share/java | sep -e "/.*([36][42])bit$//"))
 
# OLDBITS
 
JAVAP=$(basename $JAVACUR)
JAVAN=$(echo "$JAVAP" | sed -e "s/$OLDBITS/$NUMBITS/")
JAVANEW=${SHARE}/java
 
# test is dir JAVANEW error exit if not
if [ $JAVAP = $JAVANEW ]
then exit 1
else
echo "Symlink not found: $JAVAN "
fi