1 /*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 1994 David Greenman
5 * Copyright (c) 1994 Henrik Vestergaard Draboel (hvd@terry.ping.dk)
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. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Henrik Vestergaard Draboel.
19 * This product includes software developed by David Greenman.
20 * 4. Neither the names of the authors nor the names of contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37 #include <sys/param.h>
38 #include <sys/rtprio.h>
39
40 #include <ctype.h>
41 #include <err.h>
42 #include <errno.h>
43 #include <stdio.h>
44 #include <stdlib.h>
45 #include <string.h>
46 #include <unistd.h>
47
48 static int parseint(const char *, const char *);
49 static void usage(void) __dead2;
50
51 int
main(int argc,char * argv[])52 main(int argc, char *argv[])
53 {
54 struct rtprio rtp;
55 const char *progname;
56 pid_t proc = 0;
57
58 progname = getprogname();
59
60 if (strcmp(progname, "rtprio") == 0)
61 rtp.type = RTP_PRIO_REALTIME;
62 else if (strcmp(progname, "idprio") == 0)
63 rtp.type = RTP_PRIO_IDLE;
64 else
65 errx(1, "invalid progname");
66
67 switch (argc) {
68 case 2:
69 proc = parseint(argv[1], "pid");
70 proc = abs(proc);
71 /* FALLTHROUGH */
72 case 1:
73 if (rtprio(RTP_LOOKUP, proc, &rtp) != 0)
74 err(1, "RTP_LOOKUP");
75 switch (rtp.type) {
76 case RTP_PRIO_REALTIME:
77 case RTP_PRIO_FIFO:
78 warnx("realtime priority %d", rtp.prio);
79 break;
80 case RTP_PRIO_NORMAL:
81 warnx("normal priority");
82 break;
83 case RTP_PRIO_IDLE:
84 warnx("idle priority %d", rtp.prio);
85 break;
86 default:
87 errx(1, "invalid priority type %d", rtp.type);
88 break;
89 }
90 exit(0);
91 default:
92 if (argv[1][0] == '-' || isdigit(argv[1][0])) {
93 if (argv[1][0] == '-') {
94 if (strcmp(argv[1], "-t") == 0) {
95 rtp.type = RTP_PRIO_NORMAL;
96 rtp.prio = 0;
97 } else {
98 usage();
99 break;
100 }
101 } else
102 rtp.prio = parseint(argv[1], "priority");
103 } else {
104 usage();
105 break;
106 }
107
108 if (argv[2][0] == '-') {
109 proc = parseint(argv[2], "pid");
110 proc = abs(proc);
111 }
112
113 if (rtprio(RTP_SET, proc, &rtp) != 0)
114 err(1, "RTP_SET");
115
116 if (proc == 0) {
117 execvp(argv[2], &argv[2]);
118 err(1, "execvp: %s", argv[2]);
119 }
120 exit(0);
121 }
122 /* NOTREACHED */
123 }
124
125 static int
parseint(const char * str,const char * errname)126 parseint(const char *str, const char *errname)
127 {
128 char *endp;
129 long res;
130
131 errno = 0;
132 res = strtol(str, &endp, 10);
133 if (errno != 0 || endp == str || *endp != '\0')
134 errx(1, "%s must be a number", errname);
135 if (res >= INT_MAX)
136 errx(1, "Integer overflow parsing %s", errname);
137 return (res);
138 }
139
140 static void
usage(void)141 usage(void)
142 {
143
144 (void) fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n",
145 "usage: [id|rt]prio",
146 " [id|rt]prio [-]pid",
147 " [id|rt]prio priority command [args]",
148 " [id|rt]prio priority -pid",
149 " [id|rt]prio -t command [args]",
150 " [id|rt]prio -t -pid");
151 exit(1);
152 }
153