[Tipz] Is the program being run interactively?

[Ian Langworth]

If your script needs to determine if it's being run
interactively or it's being piped to, here's the snippet:

    if [ -t 0 ]; then
        echo "interactive"
    else
        echo "pipe"
    fi

Or, in Perl,

    if ( -t STDIN ) {
        print "interactive\n";
    }
    else {
        print "pipe\n";
    }

The same applies to STDOUT and whatnot.

-- 
Ian Langworth
Project Guerrilla
Northeastern University
College of Computer and Information Science