Annotation of src/usr.bin/nice/nice.c, Revision 1.1.1.1
1.1 deraadt 1: /* $NetBSD: nice.c,v 1.9 1995/08/31 23:30:58 jtc Exp $ */
2:
3: /*
4: * Copyright (c) 1989 The Regents of the University of California.
5: * All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
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. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: #ifndef lint
37: char copyright[] =
38: "@(#) Copyright (c) 1989 The Regents of the University of California.\n\
39: All rights reserved.\n";
40: #endif /* not lint */
41:
42: #ifndef lint
43: #if 0
44: static char sccsid[] = "@(#)nice.c 5.4 (Berkeley) 6/1/90";
45: #endif
46: static char rcsid[] = "$NetBSD: nice.c,v 1.9 1995/08/31 23:30:58 jtc Exp $";
47: #endif /* not lint */
48:
49: #include <sys/types.h>
50: #include <sys/time.h>
51: #include <sys/resource.h>
52: #include <stdio.h>
53: #include <stdlib.h>
54: #include <string.h>
55: #include <locale.h>
56: #include <ctype.h>
57: #include <errno.h>
58: #include <err.h>
59: #include <unistd.h>
60:
61: #define DEFNICE 10
62:
63: static void usage();
64:
65: int
66: main(argc, argv)
67: int argc;
68: char **argv;
69: {
70: int niceness = DEFNICE;
71: int c;
72:
73: setlocale(LC_ALL, "");
74:
75: /* handle obsolete -number syntax */
76: if (argc > 1 && argv[1][0] == '-' && isdigit(argv[1][1])) {
77: niceness = atoi (argv[1] + 1);
78: argc--; argv++;
79: }
80:
81: while ((c = getopt (argc, argv, "n:")) != -1) {
82: switch (c) {
83: case 'n':
84: niceness = atoi (optarg);
85: break;
86:
87: case '?':
88: default:
89: usage();
90: break;
91: }
92: }
93: argc -= optind; argv += optind;
94:
95: if (argc == 0)
96: usage();
97:
98: errno = 0;
99: niceness += getpriority(PRIO_PROCESS, 0);
100: if (errno) {
101: err (1, "getpriority");
102: /* NOTREACHED */
103: }
104: if (setpriority(PRIO_PROCESS, 0, niceness)) {
105: warn ("setpriority");
106: }
107:
108: execvp(argv[0], &argv[0]);
109: err ((errno == ENOENT) ? 127 : 126, "%s", argv[0]);
110: /* NOTREACHED */
111: }
112:
113: static void
114: usage()
115: {
116: (void)fprintf(stderr,
117: "usage: nice [ -n increment ] utility [ argument ...]\n");
118:
119: exit(1);
120: }