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
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
37
38 #include <sys/param.h>
39 #include <sys/rtprio.h>
40
41 #include <ctype.h>
42 #include <err.h>
43 #include <errno.h>
44 #include <stdio.h>
45 #include <stdlib.h>
46 #include <string.h>
47 #include <unistd.h>
48
49 static int parseint(const char *, const char *);
50 static void usage(void);
51
52 int
main(int argc,char * argv[])53 main(int argc, char *argv[])
54 {
55 struct rtprio rtp;
56 const char *progname;
57 pid_t proc = 0;
58
59 progname = getprogname();
60
61 if (strcmp(progname, "rtprio") == 0)
62 rtp.type = RTP_PRIO_REALTIME;
63 else if (strcmp(progname, "idprio") == 0)
64 rtp.type = RTP_PRIO_IDLE;
65 else
66 errx(1, "invalid progname");
67
68 switch (argc) {
69 case 2:
70 proc = parseint(argv[1], "pid");
71 proc = abs(proc);
72 /* FALLTHROUGH */
73 case 1:
74 if (rtprio(RTP_LOOKUP, proc, &rtp) != 0)
75 err(1, "RTP_LOOKUP");
76 switch (rtp.type) {
77 case RTP_PRIO_REALTIME:
78 case RTP_PRIO_FIFO:
79 warnx("realtime priority %d", rtp.prio);
80 break;
81 case RTP_PRIO_NORMAL:
82 warnx("normal priority");
83 break;
84 case RTP_PRIO_IDLE:
85 warnx("idle priority %d", rtp.prio);
86 break;
87 default:
88 errx(1, "invalid priority type %d", rtp.type);
89 break;
90 }
91 exit(0);
92 default:
93 if (argv[1][0] == '-' || isdigit(argv[1][0])) {
94 if (argv[1][0] == '-') {
95 if (strcmp(argv[1], "-t") == 0) {
96 rtp.type = RTP_PRIO_NORMAL;
97 rtp.prio = 0;
98 } else {
99 usage();
100 break;
101 }
102 } else
103 rtp.prio = parseint(argv[1], "priority");
104 } else {
105 usage();
106 break;
107 }
108
109 if (argv[2][0] == '-') {
110 proc = parseint(argv[2], "pid");
111 proc = abs(proc);
112 }
113
114 if (rtprio(RTP_SET, proc, &rtp) != 0)
115 err(1, "RTP_SET");
116
117 if (proc == 0) {
118 execvp(argv[2], &argv[2]);
119 err(1, "execvp: %s", argv[2]);
120 }
121 exit(0);
122 }
123 /* NOTREACHED */
124 }
125
126 static int
parseint(const char * str,const char * errname)127 parseint(const char *str, const char *errname)
128 {
129 char *endp;
130 long res;
131
132 errno = 0;
133 res = strtol(str, &endp, 10);
134 if (errno != 0 || endp == str || *endp != '\0')
135 errx(1, "%s must be a number", errname);
136 if (res >= INT_MAX)
137 errx(1, "Integer overflow parsing %s", errname);
138 return (res);
139 }
140
141 static void
usage(void)142 usage(void)
143 {
144
145 (void) fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n",
146 "usage: [id|rt]prio",
147 " [id|rt]prio [-]pid",
148 " [id|rt]prio priority command [args]",
149 " [id|rt]prio priority -pid",
150 " [id|rt]prio -t command [args]",
151 " [id|rt]prio -t -pid");
152 exit(1);
153 }
154