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From: pjc@pbhyf.UUCP (Paul Condie)
Newsgroups: comp.sys.att
Subject: Re: Missing features in Unix-PC Phone Manager
Message-ID: <2312@pbhyf.UUCP>
Date: Tue, 3-Nov-87 14:04:33 EST
Article-I.D.: pbhyf.2312
Posted: Tue Nov  3 14:04:33 1987
Date-Received: Sat, 7-Nov-87 04:29:18 EST
References: <2298@emory.uucp>
Reply-To: pjc@pbhyf.UUCP (Paul Condie)
Organization: Pacific * Bell, San Ramon, CA
Lines: 12

In article <2298@emory.uucp> km@emory.uucp (Ken Mandelberg) writes:
>As far as 2 it seems like it could be done with an external
>program that just opens /dev/ph and issues the ioctl,
>except that I expect the phone manager must do an exclusive
>open on the device. In fact it may be the case that 
>the device is inherently exclusive open. Any comments from
>someone with experience writing for the device?
>

You're right, I wanted to be able to do a ioctl (PIOCGETA?) to find out
the phone status during a call but was unable to open /dev/ph?.  Open
kept returning errno 16 device busy.