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 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 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 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