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 53 main(int argc, char *argv[]) 54 { 55 struct rtprio rtp; 56 char *p; 57 pid_t proc; 58 59 /* find basename */ 60 if ((p = rindex(argv[0], '/')) == NULL) 61 p = argv[0]; 62 else 63 ++p; 64 proc = 0; 65 66 if (!strcmp(p, "rtprio")) 67 rtp.type = RTP_PRIO_REALTIME; 68 else if (!strcmp(p, "idprio")) 69 rtp.type = RTP_PRIO_IDLE; 70 71 switch (argc) { 72 case 2: 73 proc = parseint(argv[1], "pid"); 74 proc = abs(proc); 75 /* FALLTHROUGH */ 76 case 1: 77 if (rtprio(RTP_LOOKUP, proc, &rtp) != 0) 78 err(1, "RTP_LOOKUP"); 79 printf("%s: ", p); 80 switch (rtp.type) { 81 case RTP_PRIO_REALTIME: 82 case RTP_PRIO_FIFO: 83 printf("realtime priority %d\n", rtp.prio); 84 break; 85 case RTP_PRIO_NORMAL: 86 printf("normal priority\n"); 87 break; 88 case RTP_PRIO_IDLE: 89 printf("idle priority %d\n", rtp.prio); 90 break; 91 default: 92 printf("invalid priority type %d\n", rtp.type); 93 break; 94 } 95 exit(0); 96 default: 97 if (argv[1][0] == '-' || isdigit(argv[1][0])) { 98 if (argv[1][0] == '-') { 99 if (strcmp(argv[1], "-t") == 0) { 100 rtp.type = RTP_PRIO_NORMAL; 101 rtp.prio = 0; 102 } else { 103 usage(); 104 break; 105 } 106 } else 107 rtp.prio = parseint(argv[1], "priority"); 108 } else { 109 usage(); 110 break; 111 } 112 113 if (argv[2][0] == '-') 114 proc = parseint(argv[2] + 1, "pid"); 115 if (rtprio(RTP_SET, proc, &rtp) != 0) 116 err(1, "RTP_SET"); 117 118 if (proc == 0) { 119 execvp(argv[2], &argv[2]); 120 err(1, "%s", argv[2]); 121 } 122 exit(0); 123 } 124 exit(1); 125 } 126 127 static int 128 parseint(const char *str, const char *errname) 129 { 130 char *endp; 131 long res; 132 133 errno = 0; 134 res = strtol(str, &endp, 10); 135 if (errno != 0 || endp == str || *endp != '\0') 136 errx(1, "%s must be a number", errname); 137 if (res >= INT_MAX) 138 errx(1, "Integer overflow parsing %s", errname); 139 return (res); 140 } 141 142 static void 143 usage(void) 144 { 145 146 (void) fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n", 147 "usage: [id|rt]prio", 148 " [id|rt]prio [-]pid", 149 " [id|rt]prio priority command [args]", 150 " [id|rt]prio priority -pid", 151 " [id|rt]prio -t command [args]", 152 " [id|rt]prio -t -pid"); 153 exit(1); 154 } 155