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/cdefs.h>
38 __FBSDID("$FreeBSD$");
39
40 #include <sys/param.h>
41 #include <sys/rtprio.h>
42
43 #include <ctype.h>
44 #include <err.h>
45 #include <errno.h>
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <string.h>
49 #include <unistd.h>
50
51 static int parseint(const char *, const char *);
52 static void usage(void);
53
54 int
main(int argc,char * argv[])55 main(int argc, char *argv[])
56 {
57 struct rtprio rtp;
58 const char *progname;
59 pid_t proc = 0;
60
61 progname = getprogname();
62
63 if (strcmp(progname, "rtprio") == 0)
64 rtp.type = RTP_PRIO_REALTIME;
65 else if (strcmp(progname, "idprio") == 0)
66 rtp.type = RTP_PRIO_IDLE;
67 else
68 errx(1, "invalid progname");
69
70 switch (argc) {
71 case 2:
72 proc = parseint(argv[1], "pid");
73 proc = abs(proc);
74 /* FALLTHROUGH */
75 case 1:
76 if (rtprio(RTP_LOOKUP, proc, &rtp) != 0)
77 err(1, "RTP_LOOKUP");
78 switch (rtp.type) {
79 case RTP_PRIO_REALTIME:
80 case RTP_PRIO_FIFO:
81 warnx("realtime priority %d", rtp.prio);
82 break;
83 case RTP_PRIO_NORMAL:
84 warnx("normal priority");
85 break;
86 case RTP_PRIO_IDLE:
87 warnx("idle priority %d", rtp.prio);
88 break;
89 default:
90 errx(1, "invalid priority type %d", 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 = parseint(argv[1], "priority");
106 } else {
107 usage();
108 break;
109 }
110
111 if (argv[2][0] == '-') {
112 proc = parseint(argv[2], "pid");
113 proc = abs(proc);
114 }
115
116 if (rtprio(RTP_SET, proc, &rtp) != 0)
117 err(1, "RTP_SET");
118
119 if (proc == 0) {
120 execvp(argv[2], &argv[2]);
121 err(1, "execvp: %s", argv[2]);
122 }
123 exit(0);
124 }
125 /* NOTREACHED */
126 }
127
128 static int
parseint(const char * str,const char * errname)129 parseint(const char *str, const char *errname)
130 {
131 char *endp;
132 long res;
133
134 errno = 0;
135 res = strtol(str, &endp, 10);
136 if (errno != 0 || endp == str || *endp != '\0')
137 errx(1, "%s must be a number", errname);
138 if (res >= INT_MAX)
139 errx(1, "Integer overflow parsing %s", errname);
140 return (res);
141 }
142
143 static void
usage(void)144 usage(void)
145 {
146
147 (void) fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n",
148 "usage: [id|rt]prio",
149 " [id|rt]prio [-]pid",
150 " [id|rt]prio priority command [args]",
151 " [id|rt]prio priority -pid",
152 " [id|rt]prio -t command [args]",
153 " [id|rt]prio -t -pid");
154 exit(1);
155 }
156