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ksh prompt yes/no question

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# 1  
Old 07-11-2014
ksh prompt yes/no question
I am writing a code like this in KSH .
Code:
#!/bin/ksh
echo is this SQL query ? yes or no
read  answer
case $answer in
        yes|Yes|y)
                echo got a positive answer
                ;;
        no|n)
                echo got a 'no'
                ;;
esac


Here after yes or no , I want the default answer to yes . How to add this ?

Thanks
# 2  
Old 07-11-2014
Try:
Code:
#!/bin/ksh
echo is this SQL query ? yes or no
read  answer
case $answer in
	yes|Yes|y|"")
		echo got a positive answer
		;;
	no|n)
		echo got a 'no'
		;;
esac

These 2 Users Gave Thanks to Don Cragun For This Post:
Scrutinizer SMartBatt
# 3  
Old 07-12-2014
You want to default to YES, although I would personally do it the other way and force the user to enter a 'Y or y'.
However how about using the _wildcard_ '*'...
(On CygWin at the moment and don't have ksh available so using sh instead...)
Code:
#!/bin/sh
echo "is this SQL query ? Y/N"
read  answer
case $answer in
        N|n)
                echo "got a 'no'"
                ;;
        *)
                echo "got a positive answer"
                ;;
esac
exit 0

Results on CygWin...
Code:
AMIGA:~> chmod 755 /tmp/yn.sh
AMIGA:~> cd /tmp
AMIGA:/tmp> dos2unix yn.sh
dos2unix: converting file yn.sh to Unix format ...
AMIGA:/tmp> ./yn.sh
is this SQL query ? Y/N
slkflksflksldkflskflksjf
got a positive answer
AMIGA:/tmp> ./yn.sh
is this SQL query ? Y/N

got a positive answer
AMIGA:/tmp> ./yn.sh
is this SQL query ? Y/N
Y
got a positive answer
AMIGA:/tmp> ./yn.sh
is this SQL query ? Y/N
y
got a positive answer
AMIGA:/tmp> ./yn.sh
is this SQL query ? Y/N
N
got a 'no'
AMIGA:/tmp> ./yn.sh
is this SQL query ? Y/N
n
got a 'no'
AMIGA:/tmp> _

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