Morning,

this might be an easy question but in the script below, when I wrap the function calls in a while true loop, the selected option is not processed. Not sure why as it works fine on linux. Thanks in advance - DG.

#!/usr/bin/ksh

show_options() {
clear
echo "====================="
echo " M A I N - M E N U "
echo "====================="
echo ""
echo "1 - Sync Training System"
echo "2 - Sync Live System"
echo "3 - Exit"
echo ""
}

read_options() {
local choice
echo "Enter choice [ 1 - 3] " choice
read choice

case $choice in
1) echo "picked 1" ;;
2) echo "picked 2" ;;
3) exit 0 ;;
*) echo "${RED}Error...${STD}" && sleep 2
esac
}


# while true
# do
show_options
read_options
# done

It works for me... Try to describe the problem more precisely.
PS: please use [code] and [/code] tags

Morning,

as requested, some more details. I'd written this script on a linux box for bash and it works fine. However, when I ship it across to an aix box running the ksh shell and run it, nothing happens for the option 1 and 2 in the case statement, although 3 does exit. When I comment out the while loop it works fine (i.e. the echo'ed text appears then the script exits (as it would when not in the loop). Looks like wrapping the read command or case statement in the while loop is causing some different behaviour and I'm not able to figure out why.

Regards,

DG

What would you expect to happen? Add some waits to your code.

Different shells have slightly different syntax. There are many bash'isms in Linux that will not work in other shells/OSes.
Try writting it as #!/bin/sh, then it should work on all unix systems.

Your script with the loop works fine for me on AIX using the stock ksh.

This is expected behavior. When you enter a number that does not cause the script to exit, it immediately runs show_options, and the first statement in show options is clear, which wipes the screen so you can't see what you just echoed. You can see it does actually echo text by doing a 'set -x' early in the script.

thanks for the input guys.

to solve it I added a pause function, i.e.

pause () {
echo "Press enter key to continue...."
read userkey
}

and called this from within option 1 and 2.

Thanks for the help.

Regards,

DG.