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
main(int argc,char * argv[])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", 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", 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
usage(void)98 usage(void)
99 {
100 extern char *__progname;
101 fprintf(stderr, "usage: %s [-n increment] utility [argument ...]\n",
102 __progname);
103 exit(1);
104 }
105