2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1989, 1993, 1994
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) 1989, 1993, 1994\n\
35 The Regents of the University of California. All rights reserved.\n";
40 static char sccsid[] = "@(#)nice.c 8.2 (Berkeley) 4/16/94";
44 #include <sys/cdefs.h>
45 __FBSDID("$FreeBSD$");
47 #include <sys/types.h>
49 #include <sys/resource.h>
65 main(int argc, char *argv[])
67 long niceness = DEFNICE;
71 /* Obsolescent syntax: -number, --number */
72 if (argc >= 2 && argv[1][0] == '-' && (argv[1][1] == '-' ||
73 isdigit((unsigned char)argv[1][1])) && strcmp(argv[1], "--") != 0)
74 if (asprintf(&argv[1], "-n%s", argv[1] + 1) < 0)
77 while ((ch = getopt(argc, argv, "n:")) != -1) {
81 niceness = strtol(optarg, &ep, 10);
82 if (ep == optarg || *ep != '\0' || errno ||
83 niceness < INT_MIN || niceness > INT_MAX)
84 errx(1, "%s: invalid nice value", optarg);
97 niceness += getpriority(PRIO_PROCESS, 0);
100 else if (setpriority(PRIO_PROCESS, 0, (int)niceness))
103 err(errno == ENOENT ? 127 : 126, "%s", *argv);
110 (void)fprintf(stderr,
111 "usage: nice [-n increment] utility [argument ...]\n");