1 /*
2 * Copyright (c) 1994 David Greenman
3 * Copyright (c) 1994 Henrik Vestergaard Draboel (hvd@terry.ping.dk)
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by Henrik Vestergaard Draboel.
17 * This product includes software developed by David Greenman.
18 * 4. Neither the names of the authors nor the names of contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $FreeBSD: src/usr.sbin/rtprio/rtprio.c,v 1.8.2.1 2001/01/29 08:07:26 kuriyama Exp $
35 * $DragonFly: src/usr.sbin/rtprio/rtprio.c,v 1.5 2005/02/04 21:32:55 cpressey Exp $
36 */
37
38 #include <sys/param.h>
39 #include <sys/rtprio.h>
40 #include <sys/errno.h>
41
42 #include <ctype.h>
43 #include <err.h>
44 #include <stdio.h>
45 #include <stdlib.h>
46 #include <string.h>
47 #include <unistd.h>
48
49 static void usage(void);
50
51 int
main(int argc,char ** argv)52 main(int argc, char **argv)
53 {
54 char *p;
55 int proc = 0;
56 struct rtprio rtp;
57
58 /* find basename */
59 if ((p = strrchr(argv[0], '/')) == NULL)
60 p = argv[0];
61 else
62 ++p;
63
64 if (!strcmp(p, "rtprio"))
65 rtp.type = RTP_PRIO_REALTIME;
66 else if (!strcmp(p, "idprio"))
67 rtp.type = RTP_PRIO_IDLE;
68
69 switch (argc) {
70 case 2:
71 proc = abs(atoi(argv[1])); /* Should check if numeric
72 * arg! */
73 /* FALLTHROUGH */
74 case 1:
75 if (rtprio(RTP_LOOKUP, proc, &rtp) != 0)
76 err(1, "%s", argv[0]);
77 printf("%s: ", p);
78 switch (rtp.type) {
79 case RTP_PRIO_REALTIME:
80 case RTP_PRIO_FIFO:
81 printf("realtime priority %d\n", rtp.prio);
82 break;
83 case RTP_PRIO_NORMAL:
84 printf("normal priority\n");
85 break;
86 case RTP_PRIO_IDLE:
87 printf("idle priority %d\n", rtp.prio);
88 break;
89 default:
90 printf("invalid priority type %d\n", rtp.type);
91 break;
92 }
93 exit(0);
94 default:
95 if (argv[1][0] == '-' || isdigit(argv[1][0])) {
96 if (argv[1][0] == '-') {
97 if (strcmp(argv[1], "-t") == 0) {
98 rtp.type = RTP_PRIO_NORMAL;
99 rtp.prio = 0;
100 } else {
101 usage();
102 break;
103 }
104 } else {
105 rtp.prio = atoi(argv[1]);
106 }
107 } else {
108 usage();
109 break;
110 }
111
112 if (argv[2][0] == '-')
113 proc = -atoi(argv[2]);
114
115 if (rtprio(RTP_SET, proc, &rtp) != 0)
116 err(1, "%s", argv[0]);
117
118 if (proc == 0) {
119 execvp(argv[2], &argv[2]);
120 err(1, "%s", argv[2]);
121 }
122 exit(0);
123 }
124 exit (1);
125 }
126
127 static void
usage(void)128 usage(void)
129 {
130 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n",
131 "usage: [id|rt]prio",
132 " [id|rt]prio [-]pid",
133 " [id|rt]prio priority command [args]",
134 " [id|rt]prio priority -pid",
135 " [id|rt]prio -t command [args]",
136 " [id|rt]prio -t -pid");
137 exit(1);
138 }
139