2 * Copyright (c) 1989, 1993, 1994
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 * 4. 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) 1989, 1993, 1994 The Regents of the University of California. All rights reserved.
30 * @(#)nice.c 8.2 (Berkeley) 4/16/94
31 * $FreeBSD: src/usr.bin/nice/nice.c,v 1.4.2.1 2002/06/18 08:40:28 tjr Exp $
32 * $DragonFly: src/usr.bin/nice/nice.c,v 1.6 2005/10/09 15:09:02 liamfoy Exp $
36 #include <sys/resource.h>
49 static void usage(void);
52 main(int argc, char **argv)
54 long niceness = DEFNICE;
58 /* Obsolescent syntax: -number, --number */
59 if (argc >= 2 && argv[1][0] == '-' && (argv[1][1] == '-' ||
60 isdigit(argv[1][1])) && strcmp(argv[1], "--") != 0)
61 if (asprintf(&argv[1], "-n%s", argv[1] + 1) < 0)
64 while ((ch = getopt(argc, argv, "n:")) != -1) {
68 niceness = strtol(optarg, &ep, 10);
69 if (ep == optarg || *ep != '\0' || errno ||
70 niceness < INT_MIN || niceness > INT_MAX)
71 errx(1, "%s: invalid nice value", optarg);
84 niceness += getpriority(PRIO_PROCESS, 0);
87 else if (setpriority(PRIO_PROCESS, 0, (int)niceness))
90 err(errno == ENOENT || errno == ENOTDIR ? 127 : 126, "%s", *argv);
97 fprintf(stderr, "usage: nice [-n incr] utility [arguments]\n");