usr/src/lib/libc/gen/nice.c

/*
 * 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) %G%";
#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));
}