fgets and dealing with CTRL+D input

Question

I am grabbing some standard input from the user and if the user presses CTRL+D, I want to display an error and terminate the program. I think perhaps my issue may

Answer 1

On Linux, Ctrl + D generates EOF, so you need to check the return value of fgets() every time. When EOF is encountered, fgets() returns a null pointer

if (fgets(buff, 10, stdin) == NULL)
    print_error();