Real Time feed for NASDAQ, Chi. Merc., Dow in Unix

I need to know where I can get real time stock market data "ticker" feed, in Unix, that can be captured for use in my data base.

If there is a subscriber service, that's good but, I really am looking for a software program that can interface with the Market in question, via modem and capture the current market stats for all reporting stocks.

Perhaps one of these will meet your requirements:

symbol wireless products or similar?