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From: kimcm@olamb.UUCP
Newsgroups: comp.unix.questions
Subject: Re: Suspending processes - (nf)
Message-ID: <192@olamb.UUCP>
Date: Mon, 19-Jan-87 07:33:26 EST
Article-I.D.: olamb.192
Posted: Mon Jan 19 07:33:26 1987
Date-Received: Sun, 1-Feb-87 16:02:58 EST
References: <836@A60.UUCP> <8200002@iaoobelix.UUCP>
Organization: AmbraSoft A/S (Denmark)
Lines: 26

In article <8200002@iaoobelix.UUCP>, wagner@iaoobelix.UUCP writes:
> There are two possiblilities:


	If you're using a BSD system:

> 	Use something like kill(pid,SIGSTOP) to suspend the process
> 	and use kill(pid,SIGCONT) to resume. Note: These signals
> 	cannot be blocked, so this is a safe way to suspend a
> 	process.

	Or if you're running under BSD || SYSV:

> 	Setup a handler which suspends the process upon receiving a
> 	specific signal, and  which wakes up when it receives another
> 	signal. (see man pages for sigpause(2), signal(2)).

	In case of SYSV, see man pages alarm(2), pause(2) and signal(2)
	instead.


> Of course a process can suspend itself at any time it wants to:
> just call sleep(3) or usleep(3)...


						Kim Chr. Madsen