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shellshsolarissolaris-10

read in solaris going to an infinite loop

# cat test.sh
#!/usr/xpg4/bin/sh
while true; do
read -p "do you want to continue (Y/N) ?" yn
    case $yn in
        [Yy]* ) echo " Yes "; 
        [Nn]* ) echo " No "; exit;;
        * ) echo "Please answer yes or no.";;
    esac
done
echo "execution completed..."

The above test script goes to infinite loop but it works fine if I use /usr/bin/bash.

How to make this script to make it working in #!/usr/xpg4/bin/sh? Please help I'm new to shell scripting and no idea about POSIX and all.

Solution

  • From www.shellcheck.net: In POSIX sh, read -p is undefined.

    Replace

    read -p "do you want to continue (Y/N) ?" yn

    by

    printf "%s" "do you want to continue (Y/N) ?"
read yn