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";
46 #include <sys/cdefs.h>
47 __FBSDID("$FreeBSD$");
49 #include <sys/types.h>
51 #include <sys/resource.h>
61 static int donice(int, int, int, int);
62 static int getnum(const char *, const char *, int *);
63 static void usage(void);
66 * Change the priority (nice) of processes
67 * or groups of processes which are already
71 main(int argc, char *argv[])
74 int errs, incr, prio, which, who;
83 if (strcmp(*argv, "-n") == 0) {
89 if (getnum("priority", *argv, &prio))
92 for (; argc > 0; argc--, argv++) {
93 if (strcmp(*argv, "-g") == 0) {
97 if (strcmp(*argv, "-u") == 0) {
101 if (strcmp(*argv, "-p") == 0) {
102 which = PRIO_PROCESS;
105 if (which == PRIO_USER) {
106 if ((pwd = getpwnam(*argv)) != NULL)
108 else if (getnum("uid", *argv, &who)) {
111 } else if (who < 0) {
112 warnx("%s: bad value", *argv);
117 if (getnum("pid", *argv, &who)) {
122 warnx("%s: bad value", *argv);
127 errs += donice(which, who, prio, incr);
133 donice(int which, int who, int prio, int incr)
138 oldprio = getpriority(which, who);
139 if (oldprio == -1 && errno) {
140 warn("%d: getpriority", who);
144 prio = oldprio + prio;
149 if (setpriority(which, who, prio) < 0) {
150 warn("%d: setpriority", who);
153 fprintf(stderr, "%d: old priority %d, new priority %d\n", who,
159 getnum(const char *com, const char *str, int *val)
165 v = strtol(str, &ep, 10);
166 if (v < INT_MIN || v > INT_MAX || errno == ERANGE) {
167 warnx("%s argument %s is out of range.", com, str);
170 if (ep == str || *ep != '\0' || errno != 0) {
171 warnx("Bad %s argument: %s.", com, str);
182 fprintf(stderr, "%s\n%s\n",
183 "usage: renice priority [[-p] pid ...] [[-g] pgrp ...] [[-u] user ...]",
184 " renice -n increment [[-p] pid ...] [[-g] pgrp ...] [[-u] user ...]");