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From: trevc@tecate.mips.com (Trevor Cotton)
Newsgroups: comp.unix.questions,comp.unix.wizards,comp.unix.internals
Subject: Re: determining if DCE device is ready
Message-ID: <2576@spim.mips.COM>
Date: 23 Apr 91 21:43:18 GMT
References: <8272@alpha.cam.nist.gov>
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In article <8272@alpha.cam.nist.gov>, coleman@cam.nist.gov (Sean Sheridan Coleman X5672) writes:
|> I am working on a program that uses the tty serial lines.  i 
|> would like to be able from my program to sense if the DCE (Data
|> Communication Equipment) is at the other end and running, ie 
|> i dont want to have the program connect to a port that has 
|> nothing plugged into it. Is there a way to see if DATA CARRIER
|> DETECT is high at the DCE end from a C program.
|> 
|> 
|> Thanks in advanced`
|> 
|> Sean Coleman
|> NIST
|> coleman@bldrdoc.gov

If your OS has Berkeley functionality you should be able to use the
TIOCMGET ioctl.

-- 
--trevc--