1/*
2 * Copyright (c) 1989, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
20 *
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
31 * SUCH DAMAGE.
32 */
33
34#include <sys/cdefs.h>
35
36__FBSDID("$FreeBSD: head/usr.bin/nice/nice.c 87291 2001-12-03 21:10:47Z dwmalone $");
37
38#ifndef lint
39static const char copyright[] =
40"@(#) Copyright (c) 1989, 1993, 1994\n\
41 The Regents of the University of California. All rights reserved.\n";
42#endif /* not lint */
43
44#ifndef lint
45static const char sccsid[] = "@(#)nice.c 8.2 (Berkeley) 4/16/94";
46#endif /* not lint */
47
48#include <sys/types.h>
49#include <sys/time.h>
50#include <sys/resource.h>
51
52#include <ctype.h>
53#include <err.h>
54#include <errno.h>
55#include <stdio.h>
56#include <stdlib.h>
57#include <unistd.h>
58#include <string.h>
59
60#define DEFNICE 10
61
62void usage __P((void));
63
64int
65main(argc, argv)
66 int argc;
67 char *argv[];
68{
69 int niceness = DEFNICE;
70
71 if (argc < 2)
72 usage();
73
74 if (argv[1][0] == '-') {
75 if (argv[1][1] == '-' || isdigit(argv[1][1])) {
76 niceness = atoi(argv[1] + 1);
77 ++argv;
78 } else
79 errx(1, "illegal option -- %s", argv[1]);
80 }
81
82 if (argv[1] == NULL)
83 usage();
84
85 errno = 0;
86 niceness += getpriority(PRIO_PROCESS, 0);
87 if (errno)
88 err(1, "getpriority");
89 if (setpriority(PRIO_PROCESS, 0, niceness))
90 err(1, "setpriority");
91 execvp(argv[1], &argv[1]);
92 err(1, "%s", argv[1]);
93}
94
95void
96usage()
97{
98 (void)fprintf(stderr, "usage: nice [-number] command [arguments]\n");
99 exit(1);
100}