Select in loop don't ask for input - bash

Question

I'm trying to ask a question in a loop (ask confirmation to treat each file in a directory, for instance).
This piece of code work perfectly :
PS3="Dummy question ? "
select CHOICE_MADE in "Ans1" 'Ans2' 'Ans3'; do
if [[ -n ${CHOICE_MADE} ]]; then
printf "Choice made : %s\n" "${CHOICE_MADE}"
break;
fi
done
I need to loop this question (Note I name the variable in loop, to avoid using default $REPLY variable) :
while read -r TOTO; do
PS3="Dummy question ? "
select CHOICE_MADE in Ans1 Ans2 Ans3; do
if [[ -n ${CHOICE_MADE} ]]; then
printf "Choice made : %s\n" "${CHOICE_MADE}"
break;
fi
done
done < <(echo Step1 Step2)
Select doesn't prompt anything.
I don't want to use whiptail (which masks script previous output), dialog (need to be installed on debian) or any gui.
I know I could use read to solve my problem, but I would like keeping select loop.
Thanks in advance for your help.

Answer 1

You have to note two things in order to make it works.
1) Bad use of `stdin`
First of all, passing < (echo Step1 Step2) to your while cycle, you are making use of stdin and that's why the prompt does not wait for any input at all (It already has it!).
You can get rid of it by using file descriptors:
exec 3< <(echo Step1 Step2) ### Create fd "3" and put output of echo in it
while read -r TOTO <&3; do
PS3="Dummy question ? "
select CHOICE_MADE in Ans1 Ans2 Ans3; do
if [[ -n ${CHOICE_MADE} ]]; then
printf "Choice made : %s\n" "${CHOICE_MADE}"
break
fi
done
done
exec 3>&- ### clean fd 3
I left unchanged the rest of code.
2) Bad use of `read`
Another thing you have to think of, is that read -r will read line by line what you give him, and a simple echo Step1 Step2 will produce only a single line, so you will cycle through just a single occurrence.
In order to get rid of this unwanted behaviour you will have to use other solutions.
One solution I can think of at the moment is heredoc:
exec 3<< EOF
Step1
Step2
EOF
while read -r TOTO <&3; do
PS3="Dummy question ? "
select CHOICE_MADE in Ans1 Ans2 Ans3; do
if [[ -n ${CHOICE_MADE} ]]; then
printf "Choice made: %s\n" "${CHOICE_MADE}"
break
fi
done
done
exec 3>&- ### clean fd 3
Note that using several heredoc is not advisable and best practices suggest to use actual files instead, because a script should contains logic, not data.