I have a question, Im having very simple script that starts anpther binary file in loop it looka like this:
for (( i=0; \\\\$i <= 5; i++ )) ; do
test.sh
I believe using yes might be enough if your test.sh script doesn't use its standard input for other purposes : yes will produce an infinite stream of lines of y by default, or any other string you pass it as a parameter. Each time the test.sh checks for user input, it should consume a line of that input and carry on with its actions.
Using yes Y, you could provide your test.sh script with more Y than it will ever need :
yes Y | test.sh
To use it with your loop, you might as well pipe it to the loop's stdin rather than to the test.sh invocation :
yes Y | for (( i=0; i <= 5; i++ )) ; do
test.sh
done