how to insert ctrl+d into my linux script?

Question

I want to make the following commands:

cat > template.txt [enter in the terminal] text [Ctrl+d in the terminal]

in a script.

Is there a way to tell the script to do enter\Ctrl d? Is there a way to create a file and write to it in script?

I didn't find anything that worked for me.

Thanks.

Answer 1

A Here Document is kind of like a script version of what you're talking about, I think, although it is not entirely clear to me from your description.

#!/bin/bash

cat > template.txt <<- EOF
    Here
    is some 
    text.
EOF

Ctrl-D itself is the EOF character, ASCII 4.

Answer 2

When you want an interactieve user enter lines and add them to your file until the user enters an ^D you can use the next script:

echo "Please give input"

while read -r line; do
            echo "Enter next line or ^D"
            echo "${line}" >> template.txt
done
echo "After loop"

You do not have to check for ^D, that will be recognized by read without doing something extra.So you do not need to use CTRL-V CTRL-D in vi.