1 |
|
|
/* $OpenBSD: nice.c,v 1.17 2016/10/28 07:22:59 schwarze Exp $ */ |
2 |
|
|
/* $NetBSD: nice.c,v 1.9 1995/08/31 23:30:58 jtc Exp $ */ |
3 |
|
|
|
4 |
|
|
/* |
5 |
|
|
* Copyright (c) 1989 The Regents of the University of California. |
6 |
|
|
* All rights reserved. |
7 |
|
|
* |
8 |
|
|
* Redistribution and use in source and binary forms, with or without |
9 |
|
|
* modification, are permitted provided that the following conditions |
10 |
|
|
* are met: |
11 |
|
|
* 1. Redistributions of source code must retain the above copyright |
12 |
|
|
* notice, this list of conditions and the following disclaimer. |
13 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright |
14 |
|
|
* notice, this list of conditions and the following disclaimer in the |
15 |
|
|
* documentation and/or other materials provided with the distribution. |
16 |
|
|
* 3. Neither the name of the University nor the names of its contributors |
17 |
|
|
* may be used to endorse or promote products derived from this software |
18 |
|
|
* without specific prior written permission. |
19 |
|
|
* |
20 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
21 |
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
22 |
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
23 |
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
24 |
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
25 |
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
26 |
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
27 |
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
28 |
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
29 |
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
30 |
|
|
* SUCH DAMAGE. |
31 |
|
|
*/ |
32 |
|
|
|
33 |
|
|
#include <sys/resource.h> |
34 |
|
|
|
35 |
|
|
#include <ctype.h> |
36 |
|
|
#include <err.h> |
37 |
|
|
#include <errno.h> |
38 |
|
|
#include <stdio.h> |
39 |
|
|
#include <stdlib.h> |
40 |
|
|
#include <unistd.h> |
41 |
|
|
|
42 |
|
|
#define DEFNICE 10 |
43 |
|
|
|
44 |
|
|
static void __dead usage(void); |
45 |
|
|
|
46 |
|
|
int |
47 |
|
|
main(int argc, char *argv[]) |
48 |
|
|
{ |
49 |
|
|
const char *errstr; |
50 |
|
|
int prio = DEFNICE; |
51 |
|
|
int c; |
52 |
|
|
|
53 |
|
|
if (pledge("stdio exec proc flock rpath cpath wpath", NULL) == -1) |
54 |
|
|
err(1, "pledge"); |
55 |
|
|
|
56 |
|
|
/* handle obsolete -number syntax */ |
57 |
|
|
if (argc > 1 && argv[1][0] == '-' && |
58 |
|
|
isdigit((unsigned char)argv[1][1])) { |
59 |
|
|
prio = strtonum(argv[1] + 1, PRIO_MIN, PRIO_MAX, &errstr); |
60 |
|
|
if (errstr) |
61 |
|
|
errx(1, "increment is %s", errstr); |
62 |
|
|
argc--; |
63 |
|
|
argv++; |
64 |
|
|
} |
65 |
|
|
|
66 |
|
|
while ((c = getopt (argc, argv, "n:")) != -1) { |
67 |
|
|
switch (c) { |
68 |
|
|
case 'n': |
69 |
|
|
prio = strtonum(optarg, PRIO_MIN, PRIO_MAX, &errstr); |
70 |
|
|
if (errstr) |
71 |
|
|
errx(1, "increment is %s", errstr); |
72 |
|
|
break; |
73 |
|
|
default: |
74 |
|
|
usage(); |
75 |
|
|
} |
76 |
|
|
} |
77 |
|
|
argc -= optind; |
78 |
|
|
argv += optind; |
79 |
|
|
|
80 |
|
|
if (argc == 0) |
81 |
|
|
usage(); |
82 |
|
|
|
83 |
|
|
errno = 0; |
84 |
|
|
prio += getpriority(PRIO_PROCESS, 0); |
85 |
|
|
if (errno) |
86 |
|
|
err(1, "getpriority"); |
87 |
|
|
if (setpriority(PRIO_PROCESS, 0, prio)) |
88 |
|
|
warn("setpriority"); |
89 |
|
|
|
90 |
|
|
if (pledge("stdio exec flock rpath cpath wpath", NULL) == -1) |
91 |
|
|
err(1, "pledge"); |
92 |
|
|
|
93 |
|
|
execvp(argv[0], &argv[0]); |
94 |
|
|
err((errno == ENOENT) ? 127 : 126, "%s", argv[0]); |
95 |
|
|
} |
96 |
|
|
|
97 |
|
|
static void __dead |
98 |
|
|
usage(void) |
99 |
|
|
{ |
100 |
|
|
extern char *__progname; |
101 |
|
|
fprintf(stderr, "usage: %s [-n increment] utility [argument ...]\n", |
102 |
|
|
__progname); |
103 |
|
|
exit(1); |
104 |
|
|
} |