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Date:      Thu, 28 May 1998 17:27:31 -0400 (EDT)
From:      Peter Dufault <dufault@hda.com>
To:        mike@smith.net.au (Mike Smith)
Cc:        current@FreeBSD.ORG
Subject:   Re: cdrecord trouble on currnet
Message-ID:  <199805282127.RAA21367@hda.hda.com>
In-Reply-To: <199805281948.MAA01246@dingo.cdrom.com> from Mike Smith at "May 28, 98 12:48:57 pm"

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> It checks _POSIX_PRIORITY_SCHEDULING at build time.  
 
That's understandable, then.

> Can you give an example of the correct mechanism for using sysconf() to 
> determine the availability of the scheduler?  I'll fix it in the 
> updates I'm working on.

    if (sysconf(_SC_PRIORITY_SCHEDULING) == -1) {
        if (errno != 0) {
            /* This isn't valid:
             */
            err(EX_OSERR, "sysconf(_SC_PRIORITY_SCHEDULING)");
        }
        else {
            errx(EX_UNAVAILABLE,
            "No run-time support for POSIX priority scheduling");
        }
    }

Peter

-- 
Peter Dufault (dufault@hda.com)   Realtime development, Machine control,
HD Associates, Inc.               Safety critical systems, Agency approval

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