158f0484fSRodney W. Grimes /* 258f0484fSRodney W. Grimes * Copyright (c) 1983, 1993 358f0484fSRodney W. Grimes * The Regents of the University of California. All rights reserved. 458f0484fSRodney W. Grimes * 558f0484fSRodney W. Grimes * Redistribution and use in source and binary forms, with or without 658f0484fSRodney W. Grimes * modification, are permitted provided that the following conditions 758f0484fSRodney W. Grimes * are met: 858f0484fSRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 958f0484fSRodney W. Grimes * notice, this list of conditions and the following disclaimer. 1058f0484fSRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 1158f0484fSRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 1258f0484fSRodney W. Grimes * documentation and/or other materials provided with the distribution. 13*fbbd9655SWarner Losh * 3. Neither the name of the University nor the names of its contributors 1458f0484fSRodney W. Grimes * may be used to endorse or promote products derived from this software 1558f0484fSRodney W. Grimes * without specific prior written permission. 1658f0484fSRodney W. Grimes * 1758f0484fSRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 1858f0484fSRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1958f0484fSRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2058f0484fSRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2158f0484fSRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2258f0484fSRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2358f0484fSRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2458f0484fSRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2558f0484fSRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2658f0484fSRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2758f0484fSRodney W. Grimes * SUCH DAMAGE. 2858f0484fSRodney W. Grimes */ 2958f0484fSRodney W. Grimes 3058f0484fSRodney W. Grimes #if defined(LIBC_SCCS) && !defined(lint) 3158f0484fSRodney W. Grimes static char sccsid[] = "@(#)nice.c 8.1 (Berkeley) 6/4/93"; 3258f0484fSRodney W. Grimes #endif /* LIBC_SCCS and not lint */ 33333fc21eSDavid E. O'Brien #include <sys/cdefs.h> 34333fc21eSDavid E. O'Brien __FBSDID("$FreeBSD$"); 3558f0484fSRodney W. Grimes 3658f0484fSRodney W. Grimes #include <sys/types.h> 3758f0484fSRodney W. Grimes #include <sys/time.h> 3858f0484fSRodney W. Grimes #include <sys/resource.h> 39e659da10SJohn Birrell #include <errno.h> 4058f0484fSRodney W. Grimes #include <unistd.h> 4158f0484fSRodney W. Grimes 4258f0484fSRodney W. Grimes /* 4358f0484fSRodney W. Grimes * Backwards compatible nice. 4458f0484fSRodney W. Grimes */ 4558f0484fSRodney W. Grimes int 46e220ce08SJilles Tjoelker nice(int incr) 4758f0484fSRodney W. Grimes { 48c317cb51SJilles Tjoelker int saverrno, prio; 4958f0484fSRodney W. Grimes 50c317cb51SJilles Tjoelker saverrno = errno; 5158f0484fSRodney W. Grimes errno = 0; 5258f0484fSRodney W. Grimes prio = getpriority(PRIO_PROCESS, 0); 53c317cb51SJilles Tjoelker if (prio == -1 && errno != 0) 54c317cb51SJilles Tjoelker return (-1); 55e220ce08SJilles Tjoelker if (setpriority(PRIO_PROCESS, 0, prio + incr) == -1) { 56e220ce08SJilles Tjoelker if (errno == EACCES) 57e220ce08SJilles Tjoelker errno = EPERM; 58c317cb51SJilles Tjoelker return (-1); 59e220ce08SJilles Tjoelker } 60c317cb51SJilles Tjoelker errno = saverrno; 61c317cb51SJilles Tjoelker return (0); 6258f0484fSRodney W. Grimes } 63