Newbie Question: using Text_IO.Open() to read from standard input

[pamela.lum@gmail.com]

Hi,

I need to open a file that is passed to my ada executable as standard
input, in the following fashion:

./myprogram < inputfile.txt

My question is: How can i get the Open() function to open a file from
standard input so that I can bypass using a static file name? For
example:

Integer_File : FILE_TYPE;
Open(Integer_File, In_File, "inputfile.txt"); <-- don't open
inputfile.txt, open file from standard input instead

I know that this can be done easily with Ada.Text_IO.Text_Streams,
however I am stubborn and curious to see if there is a simple and easy
way to do it with the Open() function.

THanks