1 /*
2 * Copyright (c) 1989 The Regents of the University of California.
3 * 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 #ifndef lint
35 char copyright[] =
36 "@(#) Copyright (c) 1989 The Regents of the University of California.\n\
37 All rights reserved.\n";
38 #endif /* not lint */
39
40 #ifndef lint
41 static char sccsid[] = "@(#)nice.c 5.4 (Berkeley) 6/1/90";
42 #endif /* not lint */
43
44 #include <sys/time.h>
45 #include <sys/resource.h>
46 #include <stdio.h>
47 #include <ctype.h>
48
49 #define DEFNICE 10
50
51 /* ARGSUSED */
main(argc,argv)52 main(argc, argv)
53 int argc;
54 char **argv;
55 {
56 extern int errno;
57 int niceness;
58 char *strerror();
59
60 niceness = DEFNICE;
61 if (argv[1][0] == '-')
62 if (isdigit(argv[1][1])) {
63 niceness = atoi(argv[1] + 1);
64 ++argv;
65 }
66 else {
67 (void)fprintf(stderr, "nice: illegal option -- %c\n",
68 argv[1][1]);
69 usage();
70 }
71
72 if (!argv[1])
73 usage();
74
75 errno = 0;
76 niceness += getpriority(PRIO_PROCESS, 0);
77 if (errno) {
78 (void)fprintf(stderr, "nice: getpriority: %s\n",
79 strerror(errno));
80 exit(1);
81 }
82 if (setpriority(PRIO_PROCESS, 0, niceness)) {
83 (void)fprintf(stderr,
84 "nice: setpriority: %s\n", strerror(errno));
85 exit(1);
86 }
87 execvp(argv[1], &argv[1]);
88 (void)fprintf(stderr,
89 "nice: %s: %s\n", argv[1], strerror(errno));
90 exit(1);
91 }
92
usage()93 usage()
94 {
95 (void)fprintf(stderr,
96 "nice [ -# ] command [ options ] [ operands ]\n");
97 exit(1);
98 }
99