How can I redirect input from file and then from terminal?

Question

How can I run a program in bash in such a way that first it receives some input from a file, and then, as the file ends, it will receive input from terminal?

Answer 1

1. cat myfile - | program

   or

   cat myfile /dev/stdin | program

2. Use echo, which has the same end result:

   (echo "someinput"; cat) | program