xref: /freebsd/usr.sbin/rtprio/rtprio.c (revision 05c7a37afb48ddd5ee1bd921a5d46fe59cc70b15)
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  *	$Id$
35  */
36 
37 #include <sys/param.h>
38 #include <sys/rtprio.h>
39 #include <sys/errno.h>
40 
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include <ctype.h>
45 #include <unistd.h>
46 
47 static void usage();
48 
49 int
50 main(argc, argv)
51 	int     argc;
52 	char  **argv;
53 {
54 	char   *p;
55 	int     proc = 0;
56 	struct rtprio rtp;
57 
58 	/* find basename */
59 	if ((p = rindex(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 			perror(argv[0]);
77 			exit (1);
78 		}
79 		printf("%s: ", p);
80 		switch (rtp.type) {
81 		case RTP_PRIO_REALTIME:
82 			printf("realtime priority %d\n", rtp.prio);
83 			break;
84 		case RTP_PRIO_NORMAL:
85 			printf("normal priority\n");
86 			break;
87 		case RTP_PRIO_IDLE:
88 			printf("idle priority %d\n", rtp.prio);
89 			break;
90 		default:
91 			printf("invalid priority type %d\n", rtp.type);
92 			break;
93 		}
94 		exit(0);
95 	default:
96 		if (argv[1][0] == '-' || isdigit(argv[1][0])) {
97 			if (argv[1][0] == '-') {
98 				if (strcmp(argv[1], "-t") == 0) {
99 					rtp.type = RTP_PRIO_NORMAL;
100 					rtp.prio = 0;
101 				} else {
102 					usage(p);
103 					break;
104 				}
105 			} else {
106 				rtp.prio = atoi(argv[1]);
107 			}
108 		} else {
109 			usage(p);
110 			break;
111 		}
112 
113 		if (argv[2][0] == '-')
114 			proc = -atoi(argv[2]);
115 
116 		if (rtprio(RTP_SET, proc, &rtp) != 0) {
117 			perror(argv[0]);
118 			exit (1);
119 		}
120 
121 		if (proc == 0) {
122 			execvp(argv[2], &argv[2]);
123 			perror(argv[0]);
124 			exit (1);
125 		}
126 	}
127 	exit (1);
128 }
129 
130 static void
131 usage(basename)
132 	char   *basename;
133 {
134 	(void) fprintf(stderr, "usage: %s\n", basename);
135 	(void) fprintf(stderr, "usage: %s [-]pid\n", basename);
136 	(void) fprintf(stderr, "usage: %s priority command [ args ] \n", basename);
137 	(void) fprintf(stderr, "usage: %s priority -pid \n", basename);
138 	(void) fprintf(stderr, "usage: %s -t command [ args ] \n", basename);
139 	(void) fprintf(stderr, "usage: %s -t -pid \n", basename);
140 
141 	exit(-1);
142 }
143