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From: oz@yetti.UUCP (Ozan Yigit)
Newsgroups: net.unix-wizards
Subject: Re: job control, scheduling, and signals
Message-ID: <362@yetti.UUCP>
Date: Mon, 21-Apr-86 15:58:14 EST
Article-I.D.: yetti.362
Posted: Mon Apr 21 15:58:14 1986
Date-Received: Mon, 21-Apr-86 19:05:22 EST
References: <1097@psivax.UUCP> <198@desint.UUCP> <897@umcp-cs.UUCP> <205@desint.UUCP>
Reply-To: oz@yetti.UUCP (Ozan Yigit)
Organization: York University Computer Science
Lines: 42
Keywords: scheduling, signals, ad neuseam
Summary: 

In article <205@desint.UUCP> geoff@desint.UUCP (Geoff Kuenning) writes:
>.....
>this statement was made in the context of a discussion that explicitly
>separates the decision to "prevent this job from proceeding" from the
>decision to "return the interactive user to the command interpreter
>or to a different previously-active process".  Indeed, these are two
>different functionalities, and there is no reason to lump them together
>as in BSD just because "stopping a job" (as a scheduling decision) is
>a necessary prerequisite to "returning the user to the command
>interpreter".
>

	You make it sound like the only way to stop a process from
	proceeding is to hit ^Z in csh !! The stopping facility, as a
	general operating system facility is there, (SIGSTOP, SIGCONT, 
	SIGTSTP..) and csh happens to use it. I do not see why it should 
	not make use of the facility, given that it is so handy.

	With regards to not returning the user to the command inter-
	preter, what else there to do ?? Since the process is just
	a CHILD, it sounds silly to stop it, and let it hanging to
	the terminal, and sit there.
 

>
>Nobody denies that need;  I just pointed out that BSD lumped the
>implementation together with a piece of the scheduler in an extremely
>inelegant fashion...  
>
	What would be a more *elegant* way ??? It is a general
	facility within the system, and usable from within csh
	with a single keystroke !! [Wait till I get key mappings
	into csh.. than you can use your favorite emacs binding
	for the same purpose :-)]

oZ
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