2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1983, 1989, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 static const char copyright[] =
34 "@(#) Copyright (c) 1983, 1989, 1993\n\
35 The Regents of the University of California. All rights reserved.\n";
40 static char sccsid[] = "@(#)renice.c 8.1 (Berkeley) 6/9/93";
44 #include <sys/cdefs.h>
45 #include <sys/types.h>
47 #include <sys/resource.h>
58 static int donice(int, int, int, bool);
59 static int getnum(const char *, const char *, int *);
60 static void usage(void);
63 * Change the priority (nice) of processes
64 * or groups of processes which are already
68 main(int argc, char *argv[])
71 bool havedelim = false, haveprio = false, incr = false;
72 int errs = 0, prio = 0, who = 0, which = PRIO_PROCESS;
74 for (argc--, argv++; argc > 0; argc--, argv++) {
76 /* can occur at any time prior to delimiter */
77 if (strcmp(*argv, "-g") == 0) {
81 if (strcmp(*argv, "-u") == 0) {
85 if (strcmp(*argv, "-p") == 0) {
89 if (strcmp(*argv, "--") == 0) {
93 if (strcmp(*argv, "-n") == 0) {
94 /* may occur only once, prior to priority */
95 if (haveprio || incr || argc < 2)
99 /* fall through to priority */
103 /* must occur exactly once, prior to target */
104 if (getnum("priority", *argv, &prio))
109 if (which == PRIO_USER) {
110 if ((pwd = getpwnam(*argv)) != NULL)
112 else if (getnum("uid", *argv, &who)) {
115 } else if (who < 0) {
116 warnx("%s: bad value", *argv);
121 if (getnum("pid", *argv, &who)) {
126 warnx("%s: bad value", *argv);
131 errs += donice(which, who, prio, incr);
139 donice(int which, int who, int prio, bool incr)
144 oldprio = getpriority(which, who);
145 if (oldprio == -1 && errno) {
146 warn("%d: getpriority", who);
150 prio = oldprio + prio;
155 if (setpriority(which, who, prio) < 0) {
156 warn("%d: setpriority", who);
159 fprintf(stderr, "%d: old priority %d, new priority %d\n", who,
165 getnum(const char *com, const char *str, int *val)
171 v = strtol(str, &ep, 10);
172 if (v < INT_MIN || v > INT_MAX || errno == ERANGE) {
173 warnx("%s argument %s is out of range.", com, str);
176 if (ep == str || *ep != '\0' || errno != 0) {
177 warnx("%s argument %s is invalid.", com, str);
188 fprintf(stderr, "%s\n%s\n",
189 "usage: renice priority [[-p] pid ...] [[-g] pgrp ...] [[-u] user ...]",
190 " renice -n increment [[-p] pid ...] [[-g] pgrp ...] [[-u] user ...]");