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. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#) Copyright (c) 1983, 1989, 1993 The Regents of the University of California. All rights reserved.
30 * @(#)renice.c 8.1 (Berkeley) 6/9/93
31 * $FreeBSD: src/usr.bin/renice/renice.c,v 1.4.2.3 2002/06/17 23:58:46 tjr Exp $
32 * $DragonFly: src/usr.bin/renice/renice.c,v 1.5 2008/10/16 01:52:33 swildner Exp $
36 #include <sys/resource.h>
46 static int donice(int, int, int, int);
47 static int getnum(const char *, const char *, int *);
48 static void usage(void);
51 * Change the priority (nice) of processes
52 * or groups of processes which are already
56 main(int argc
, char *argv
[])
59 int errs
, incr
, prio
, which
, who
;
68 if (strcmp(*argv
, "-n") == 0) {
74 if (getnum("priority", *argv
, &prio
))
77 for (; argc
> 0; argc
--, argv
++) {
78 if (strcmp(*argv
, "-g") == 0) {
82 if (strcmp(*argv
, "-u") == 0) {
86 if (strcmp(*argv
, "-p") == 0) {
90 if (which
== PRIO_USER
) {
91 if ((pwd
= getpwnam(*argv
)) != NULL
)
93 else if (getnum("uid", *argv
, &who
)) {
97 warnx("%s: bad value", *argv
);
102 if (getnum("pid", *argv
, &who
)) {
107 warnx("%s: bad value", *argv
);
112 errs
+= donice(which
, who
, prio
, incr
);
118 donice(int which
, int who
, int prio
, int incr
)
123 oldprio
= getpriority(which
, who
);
124 if (oldprio
== -1 && errno
) {
125 warn("%d: getpriority", who
);
129 prio
= oldprio
+ prio
;
134 if (setpriority(which
, who
, prio
) < 0) {
135 warn("%d: setpriority", who
);
138 fprintf(stderr
, "%d: old priority %d, new priority %d\n", who
,
144 getnum(const char *com
, const char *str
, int *val
)
150 v
= strtol(str
, &ep
, 10);
151 if (v
< INT_MIN
|| v
> INT_MAX
|| errno
== ERANGE
) {
152 warnx("%s argument %s is out of range.", com
, str
);
155 if (ep
== str
|| *ep
!= '\0') {
156 warnx("Bad %s argument: %s.", com
, str
);
167 fprintf(stderr
, "%s\n%s\n",
168 "usage: renice [priority | [-n incr]] [[-p] pid ...] [[-g] pgrp ...]",