$ yes | ./script

$ yes n | ./script

$ printf 'ynynyn' | ./script

$ printf 'yesnnonmayben' | ./script

$ printf 'yyy' | ./script

$ ./script << EOF
y
y
y
EOF

$ ./script <<< "y
y
y
"

$ ./script < inputfile

$ ./script < echo 'yyyyyyyyyyyyyy'
bash: echo: No such file or directory

$ ./script 'yyyyyyyyyyyyyy' < echo
bash: echo: No such file or directory

# Assume $remote_server, $my_user_id, $my_password, and $my_command were read in earlier
# in the script.
# Open a telnet session to a remote server, and wait for a username prompt.
spawn telnet $remote_server
expect "username:"
# Send the username, and then wait for a password prompt.
send "$my_user_idr"
expect "password:"
# Send the password, and then wait for a shell prompt.
send "$my_passwordr"
expect "%"
# Send the prebuilt command, and then wait for another shell prompt.
send "$my_commandr"
expect "%"
# Capture the results of the command into a variable. This can be displayed, or written to disk.
set results $expect_out(buffer)
# Exit the telnet session, and wait for a special end-of-file character.
send "exitr"
expect eof

spawn script.sh
expect "Are you sure you want to continue connecting (yes/no)?"
send "yes"

yes | script

NAME
       yes - output a string repeatedly until killed

SYNOPSIS
       yes [STRING]...
       yes OPTION

DESCRIPTION
       Repeatedly output a line with all specified STRING(s), or 'y'.

# -Wy force signaturewipe (if exists)
echo "y" | sudo lvcreate -W y -n $lvName -L "$lvSize"G /dev/"$svg" >> $nfsUtilLog