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      1  1.13  christos /*	$NetBSD: nice.c,v 1.13 2011/05/01 02:49:54 christos Exp $	*/
      2   1.5       cgd 
      3   1.1       cgd /*
      4   1.5       cgd  * Copyright (c) 1983, 1993
      5   1.5       cgd  *	The Regents of the University of California.  All rights reserved.
      6   1.1       cgd  *
      7   1.1       cgd  * Redistribution and use in source and binary forms, with or without
      8   1.1       cgd  * modification, are permitted provided that the following conditions
      9   1.1       cgd  * are met:
     10   1.1       cgd  * 1. Redistributions of source code must retain the above copyright
     11   1.1       cgd  *    notice, this list of conditions and the following disclaimer.
     12   1.1       cgd  * 2. Redistributions in binary form must reproduce the above copyright
     13   1.1       cgd  *    notice, this list of conditions and the following disclaimer in the
     14   1.1       cgd  *    documentation and/or other materials provided with the distribution.
     15  1.12       agc  * 3. Neither the name of the University nor the names of its contributors
     16   1.1       cgd  *    may be used to endorse or promote products derived from this software
     17   1.1       cgd  *    without specific prior written permission.
     18   1.1       cgd  *
     19   1.1       cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20   1.1       cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21   1.1       cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22   1.1       cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23   1.1       cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24   1.1       cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25   1.1       cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26   1.1       cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27   1.1       cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28   1.1       cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29   1.1       cgd  * SUCH DAMAGE.
     30   1.1       cgd  */
     31   1.1       cgd 
     32   1.6  christos #include <sys/cdefs.h>
     33   1.1       cgd #if defined(LIBC_SCCS) && !defined(lint)
     34   1.5       cgd #if 0
     35   1.5       cgd static char sccsid[] = "@(#)nice.c	8.1 (Berkeley) 6/4/93";
     36   1.5       cgd #else
     37  1.13  christos __RCSID("$NetBSD: nice.c,v 1.13 2011/05/01 02:49:54 christos Exp $");
     38   1.5       cgd #endif
     39   1.1       cgd #endif /* LIBC_SCCS and not lint */
     40   1.1       cgd 
     41   1.7       jtc #include "namespace.h"
     42   1.4   mycroft #include <sys/types.h>
     43   1.1       cgd #include <sys/time.h>
     44   1.1       cgd #include <sys/resource.h>
     45   1.8     mikel #include <errno.h>
     46   1.1       cgd #include <unistd.h>
     47   1.7       jtc 
     48   1.7       jtc #ifdef __weak_alias
     49   1.9   mycroft __weak_alias(nice,_nice)
     50   1.7       jtc #endif
     51   1.1       cgd 
     52   1.1       cgd /*
     53   1.1       cgd  * Backwards compatible nice.
     54   1.1       cgd  */
     55   1.1       cgd int
     56  1.13  christos nice(int incr)
     57   1.1       cgd {
     58  1.11    kleink 	int prio;
     59   1.1       cgd 
     60   1.1       cgd 	errno = 0;
     61   1.1       cgd 	prio = getpriority(PRIO_PROCESS, 0);
     62   1.1       cgd 	if (prio == -1 && errno)
     63  1.13  christos 		return -1;
     64  1.13  christos 	if (setpriority(PRIO_PROCESS, 0, prio + incr) == -1) {
     65  1.13  christos 		if (errno == EACCES)
     66  1.13  christos 			errno = EPERM;
     67  1.13  christos 		return -1;
     68  1.13  christos 	}
     69  1.13  christos 	return getpriority(PRIO_PROCESS, 0);
     70   1.1       cgd }
     71