2 * Copyright (c) 1983, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 static const char copyright[] =
36 "@(#) Copyright (c) 1983, 1989, 1993\n\
37 The Regents of the University of California. All rights reserved.\n";
42 static char sccsid[] = "@(#)renice.c 8.1 (Berkeley) 6/9/93";
44 static const char rcsid[] =
48 #include <sys/types.h>
50 #include <sys/resource.h>
57 int donice __P((int, int, int));
58 static void usage __P((void));
61 * Change the priority (nice) of processes
62 * or groups of processes which are already
69 int which = PRIO_PROCESS;
70 int who = 0, prio, errs = 0;
81 for (; argc > 0; argc--, argv++) {
82 if (strcmp(*argv, "-g") == 0) {
86 if (strcmp(*argv, "-u") == 0) {
90 if (strcmp(*argv, "-p") == 0) {
94 if (which == PRIO_USER) {
95 register struct passwd *pwd = getpwnam(*argv);
98 warnx("%s: unknown user", *argv);
105 warnx("%s: bad value", *argv);
109 errs += donice(which, who, prio);
118 "usage: renice priority [ [ -p ] pids ] [ [ -g ] pgrps ] [ [ -u ] users ]\n");
123 donice(which, who, prio)
124 int which, who, prio;
129 errno = 0, oldprio = getpriority(which, who);
130 if (oldprio == -1 && errno) {
131 warn("%d: getpriority", who);
134 if (setpriority(which, who, prio) < 0) {
135 warn("%d: setpriority", who);
138 printf("%d: old priority %d, new priority %d\n", who, oldprio, prio);