Hello all I am writing a shell script for unix, and I am trying to get it to ask me if instances are stopped, and then if the version of java running is correct, if not I want it to ask me to switch to the other bit version. I am newish to shell and not clear on how to to input prompts for yes/no etc, I cant get it to run properly,could someone please help?
Code:
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
This could be bash or ksh or something else similar. Which shell are you running in? When you know that, try man <your shell> and look for the section about the read built-in command. There are variations, but a common one allows:-
Code:
read var1?"Prompting text : "
... such that the message is displayed (trailing space to make it look nice when the user types) and put the response into variable var1
its ksh, I just can't get it when i run it to prompt my questions for yes no and all, it runs through and displays all else, but just wont do that for me
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