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 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 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 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