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000389_news@columbia.edu_Tue Nov 14 00:03:56 1995.msg
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(5.65c+CU/IDA-1.4.4/HLK for <kermit.misc@watsun>); Tue, 14 Nov 1995 13:22:28 -0500
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From: jjf@dsbc.icl.co.uk (J.J.Farrell)
Subject: Re: disable "disconnect" when exit from kermit
Message-Id: <DI0Auo.MDC@dsbc.icl.co.uk>
Organization: ICL, Bracknell, UK.
References: <DHu494.9p5@scisun.sci.ccny.cuny.edu> <4888ns$j8s@apakabar.cc.columbia.edu>
Date: Tue, 14 Nov 1995 00:03:56 GMT
Lines: 15
Apparently-To: kermit.misc@watsun.cc.columbia.edu
In article <4888ns$j8s@apakabar.cc.columbia.edu> fdc@watsun.cc.columbia.edu (Frank da Cruz) writes:
>
>It is a fundamental property of UNIX that when a process exits, then every
>file that was opened by that process is automatically closed by UNIX.
>Closing a terminal device (such as a dialout tty device) hangs it up.
>There is nothing the process can do about it.
On most modern (and many ancient) versions of UNIX (System V derived
or cloned), the process can clear the HUPCL flag (Hang UP on CLose)
before exiting, thus explicitly telling the terminal device not to
hang up the line when it is closed. I'd be surprised if equivalent
functionality isn't present in other flavours of UNIX.
My opinions; I do not speak for my employer.