Bash read input in case statement not working as expected

[woodson2]

I'm having an issue with bash read input when using a case statement.


The script halts and doesn't read the input on the first loop. if I hit enter then the scripts starts to respond as expected. Need some help here.



defaultans=8hrs
read -e -i $defaultans -p "${bldwht}How long would you like to grant access to $USERNAME (8hrs,24hrs,48hrs,72hrs,96hrs,1wk or 2wk)? ${txtrst}" input
defaultans="${input:-$defaultans}"
#echo -e "${bldwht}How long would you like to grant access to $USERNAME (8hrs,24hrs,48hrs,72hrs,96hrs,1wk or 2wk)? ${txtrst}"
echo " "
echo " "
while true; do
read defaultans
case $defaultans in
8hrs ) break;;
24hrs ) break;;
48hrs ) break;;
72hrs ) break;;
96hrs ) break;;
1wk ) break;;
2wk ) break;;
* ) echo "You entered an invalid choice. You must choose 8hrs,24hrs,48hrs,72hrs,96hrs,1wk or 2wk access.";;
esac
done









Script output in debug.


+ defaultans=8hrs
+ read -e -i 8hrs -p 'How long would you like to grant access to tnew (8hrs,24hrs,48hrs,72hrs,96hrs,1wk or 2wk)? ' input
How long would you like to grant access to tnew (8hrs,24hrs,48hrs,72hrs,96hrs,1wk or 2wk)? 8hrs
+ defaultans=8hrs
+ echo ' '


+ echo ' '


+ true
+ read defaultans < script sits here and doesn't read the given defaultans above.



##Once I hit enter one time the script proceeds as expected.
+ case $defaultans in
+ echo 'You entered an invalid choice. You must choose 8hrs,24hrs,48hrs,72hrs,96hrs,1wk or 2wk access.'
You entered an invalid choice. You must choose 8hrs,24hrs,48hrs,72hrs,96hrs,1wk or 2wk access.
+ true
+ read defaultans

[TheFu]

Best to check the ABSG for details. https://www.tldp.org/LDP/abs/html/testbranch.html#EX29

I always use getopts and functions myself.

# ################################################## #########
while getopts 'lh?' OPTION
do
case $OPTION in
l) show_license
;;
h) show_usage
;;
?) show_usage
;;
esac
done


And if you are in a loop, might want to shift.