4.3BSD-UWisc/src/lib/libc/compat-4.1/nice.c

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#if defined(LIBC_RCS) && !defined(lint)
static char rcs_id[] =
	"$Header: nice.c,v 1.2 86/09/08 17:02:00 tadl Exp $";
#endif
/*
 * RCS info
 *	$Locker:  $
 */
/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)nice.c	5.2 (Berkeley) 3/9/86";
#endif LIBC_SCCS and not lint

#include <sys/time.h>
#include <sys/resource.h>

/*
 * Backwards compatible nice.
 */
nice(incr)
	int incr;
{
	int prio;
	extern int errno;

	errno = 0;
	prio = getpriority(PRIO_PROCESS, 0);
	if (prio == -1 && errno)
		return (-1);
	return (setpriority(PRIO_PROCESS, 0, prio + incr));
}