1 /* 2 * Copyright (c) 1987, 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1987, 1988, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)time.c 8.1 (Berkeley) 6/6/93"; 43 #endif 44 static const char rcsid[] = 45 "$Id$"; 46 #endif /* not lint */ 47 48 #include <sys/types.h> 49 #include <sys/time.h> 50 #include <sys/resource.h> 51 #include <sys/signal.h> 52 #include <sys/sysctl.h> 53 #include <stdlib.h> 54 #include <sys/wait.h> 55 56 #include <err.h> 57 #include <stdio.h> 58 #include <unistd.h> 59 60 static int getstathz __P((void)); 61 static void usage __P((void)); 62 63 int 64 main(argc, argv) 65 int argc; 66 char **argv; 67 { 68 register int pid; 69 int ch, status, lflag; 70 struct timeval before, after; 71 struct rusage ru; 72 73 lflag = 0; 74 while ((ch = getopt(argc, argv, "l")) != -1) 75 switch((char)ch) { 76 case 'l': 77 lflag = 1; 78 break; 79 case '?': 80 default: 81 usage(); 82 } 83 84 if (!(argc -= optind)) 85 exit(0); 86 argv += optind; 87 88 gettimeofday(&before, (struct timezone *)NULL); 89 switch(pid = vfork()) { 90 case -1: /* error */ 91 err(1, "time"); 92 /* NOTREACHED */ 93 case 0: /* child */ 94 execvp(*argv, argv); 95 warn("%s", *argv); 96 _exit(1); 97 /* NOTREACHED */ 98 } 99 /* parent */ 100 (void)signal(SIGINT, SIG_IGN); 101 (void)signal(SIGQUIT, SIG_IGN); 102 while (wait3(&status, 0, &ru) != pid); /* XXX use waitpid */ 103 gettimeofday(&after, (struct timezone *)NULL); 104 if (status&0377) 105 warnx("command terminated abnormally"); 106 after.tv_sec -= before.tv_sec; 107 after.tv_usec -= before.tv_usec; 108 if (after.tv_usec < 0) 109 after.tv_sec--, after.tv_usec += 1000000; 110 fprintf(stderr, "%9ld.%02ld real ", after.tv_sec, after.tv_usec/10000); 111 fprintf(stderr, "%9ld.%02ld user ", 112 ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000); 113 fprintf(stderr, "%9ld.%02ld sys\n", 114 ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000); 115 if (lflag) { 116 int hz = getstathz(); 117 u_long ticks; 118 119 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) + 120 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000; 121 122 /* 123 * If our round-off on the tick calculation still puts us at 0, 124 * then always assume at least one tick. 125 */ 126 if (ticks == 0) 127 ticks = 1; 128 129 fprintf(stderr, "%10ld %s\n", 130 ru.ru_maxrss, "maximum resident set size"); 131 fprintf(stderr, "%10ld %s\n", 132 ru.ru_ixrss / ticks, "average shared memory size"); 133 fprintf(stderr, "%10ld %s\n", 134 ru.ru_idrss / ticks, "average unshared data size"); 135 fprintf(stderr, "%10ld %s\n", 136 ru.ru_isrss / ticks, "average unshared stack size"); 137 fprintf(stderr, "%10ld %s\n", 138 ru.ru_minflt, "page reclaims"); 139 fprintf(stderr, "%10ld %s\n", 140 ru.ru_majflt, "page faults"); 141 fprintf(stderr, "%10ld %s\n", 142 ru.ru_nswap, "swaps"); 143 fprintf(stderr, "%10ld %s\n", 144 ru.ru_inblock, "block input operations"); 145 fprintf(stderr, "%10ld %s\n", 146 ru.ru_oublock, "block output operations"); 147 fprintf(stderr, "%10ld %s\n", 148 ru.ru_msgsnd, "messages sent"); 149 fprintf(stderr, "%10ld %s\n", 150 ru.ru_msgrcv, "messages received"); 151 fprintf(stderr, "%10ld %s\n", 152 ru.ru_nsignals, "signals received"); 153 fprintf(stderr, "%10ld %s\n", 154 ru.ru_nvcsw, "voluntary context switches"); 155 fprintf(stderr, "%10ld %s\n", 156 ru.ru_nivcsw, "involuntary context switches"); 157 } 158 exit (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE); 159 } 160 161 static void 162 usage() 163 { 164 fprintf(stderr, "usage: time [-l] command\n"); 165 exit(1); 166 } 167 168 /* 169 * Return the frequency of the kernel's statistics clock. 170 */ 171 static int 172 getstathz() 173 { 174 struct clockinfo clockrate; 175 int mib[2]; 176 size_t size; 177 178 mib[0] = CTL_KERN; 179 mib[1] = KERN_CLOCKRATE; 180 size = sizeof clockrate; 181 if (sysctl(mib, 2, &clockrate, &size, NULL, 0) == -1) 182 err(1, "sysctl kern.clockrate"); 183 return clockrate.stathz; 184 } 185