xargs with multiple arguments

Question

I have a source input, input.txt

a.txt
b.txt
c.txt

I want to feed these input into a program as the following:

<         


        

Answer 1

How about:

echo $'a.txt\nb.txt\nc.txt' | xargs -n 3 sh -c '
   echo my-program --file="$1" --file="$2" --file="$3"
' argv0