Date: Mon, 28 Jul 1997 00:20:02 -0700 (PDT) From: Bruce Evans <bde@zeta.org.au> To: freebsd-bugs Subject: Re: kern/4113: Re: Processes shouldn't get SIGIO when the tty is set to CLOCAL Message-ID: <199707280720.AAA15172@hub.freebsd.org>
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The following reply was made to PR kern/4113; it has been noted by GNATS. From: Bruce Evans <bde@zeta.org.au> To: FreeBSD-gnats-submit@FreeBSD.ORG, leres@ee.lbl.gov Cc: Subject: Re: kern/4113: Re: Processes shouldn't get SIGIO when the tty is set to CLOCAL Date: Mon, 28 Jul 1997 17:14:12 +1000 >Subject: kern/4113: Re: Processes shouldn't get SIGIO when the tty is set to CLOCAL I'm not sure what the correct behaviour is here. One could argue that SIGIO should never be delivered for carrier rises, since carrier transitions aren't i/o. OTOH, it may be useful to deliver a SIGIO for all state transitions in the driver, in case the application cares. This would be particularly useful for monitoring the carrier state in CLOCAL mode :-). Applications that want to monitor the carrier state usually use alarms, but this gives a high latency. Bruce
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