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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#ifndef lint 31static const char copyright[] = 32"@(#) Copyright (c) 1987, 1988, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34#endif /* not lint */ 35 36#ifndef lint 37#if 0 38static char sccsid[] = "@(#)time.c 8.1 (Berkeley) 6/6/93"; 39#endif 40static const char rcsid[] = 41 "$FreeBSD$"; 42#endif /* not lint */ 43 44#include <sys/types.h> 45#include <sys/resource.h> 46#include <sys/signal.h> 47#include <sys/sysctl.h> 48#include <sys/time.h> 49#include <sys/wait.h> 50 51#include <err.h> 52#include <errno.h> 53#include <locale.h> 54#include <signal.h> 55#include <stdio.h> 56#include <stdlib.h> 57#include <stdint.h> 58#include <string.h> 59#include <unistd.h> 60 61static int getstathz(void); 62static void humantime(FILE *, long, long); 63static void showtime(FILE *, struct timeval *, struct timeval *, 64 struct rusage *); 65static void siginfo(int); 66static void usage(void); 67 68static char decimal_point; 69static struct timeval before_tv; 70static int hflag, pflag; 71 72int 73main(int argc, char **argv) 74{ 75 int aflag, ch, lflag, status; 76 int exitonsig; 77 pid_t pid; 78 struct rlimit rl; 79 struct rusage ru; 80 struct timeval after; 81 char *ofn = NULL; 82 FILE *out = stderr; 83 84 (void) setlocale(LC_NUMERIC, ""); 85 decimal_point = localeconv()->decimal_point[0]; 86 87 aflag = hflag = lflag = pflag = 0; 88 while ((ch = getopt(argc, argv, "ahlo:p")) != -1) 89 switch((char)ch) { 90 case 'a': 91 aflag = 1; 92 break; 93 case 'h': 94 hflag = 1; 95 break; 96 case 'l': 97 lflag = 1; 98 break; 99 case 'o': 100 ofn = optarg; 101 break; 102 case 'p': 103 pflag = 1; 104 break; 105 case '?': 106 default: 107 usage(); 108 } 109 110 if (!(argc -= optind)) 111 exit(0); 112 argv += optind; 113 114 if (ofn) { 115 if ((out = fopen(ofn, aflag ? "ae" : "we")) == NULL) 116 err(1, "%s", ofn); 117 setvbuf(out, (char *)NULL, _IONBF, (size_t)0); 118 } 119 120 (void)gettimeofday(&before_tv, NULL); 121 switch(pid = fork()) { 122 case -1: /* error */ 123 err(1, "time"); 124 /* NOTREACHED */ 125 case 0: /* child */ 126 execvp(*argv, argv); 127 err(errno == ENOENT ? 127 : 126, "%s", *argv); 128 /* NOTREACHED */ 129 } 130 /* parent */ 131 (void)signal(SIGINT, SIG_IGN); 132 (void)signal(SIGQUIT, SIG_IGN); 133 (void)signal(SIGINFO, siginfo); 134 while (wait4(pid, &status, 0, &ru) != pid); 135 (void)gettimeofday(&after, NULL); 136 if ( ! WIFEXITED(status)) 137 warnx("command terminated abnormally"); 138 exitonsig = WIFSIGNALED(status) ? WTERMSIG(status) : 0; 139 showtime(out, &before_tv, &after, &ru); 140 if (lflag) { 141 int hz = getstathz(); 142 u_long ticks; 143 144 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) + 145 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000; 146 147 /* 148 * If our round-off on the tick calculation still puts us at 0, 149 * then always assume at least one tick. 150 */ 151 if (ticks == 0) 152 ticks = 1; 153 154 fprintf(out, "%10ld %s\n", 155 ru.ru_maxrss, "maximum resident set size"); 156 fprintf(out, "%10ld %s\n", 157 ru.ru_ixrss / ticks, "average shared memory size"); 158 fprintf(out, "%10ld %s\n", 159 ru.ru_idrss / ticks, "average unshared data size"); 160 fprintf(out, "%10ld %s\n", 161 ru.ru_isrss / ticks, "average unshared stack size"); 162 fprintf(out, "%10ld %s\n", 163 ru.ru_minflt, "page reclaims"); 164 fprintf(out, "%10ld %s\n", 165 ru.ru_majflt, "page faults"); 166 fprintf(out, "%10ld %s\n", 167 ru.ru_nswap, "swaps"); 168 fprintf(out, "%10ld %s\n", 169 ru.ru_inblock, "block input operations"); 170 fprintf(out, "%10ld %s\n", 171 ru.ru_oublock, "block output operations"); 172 fprintf(out, "%10ld %s\n", 173 ru.ru_msgsnd, "messages sent"); 174 fprintf(out, "%10ld %s\n", 175 ru.ru_msgrcv, "messages received"); 176 fprintf(out, "%10ld %s\n", 177 ru.ru_nsignals, "signals received"); 178 fprintf(out, "%10ld %s\n", 179 ru.ru_nvcsw, "voluntary context switches"); 180 fprintf(out, "%10ld %s\n", 181 ru.ru_nivcsw, "involuntary context switches"); 182 } 183 /* 184 * If the child has exited on a signal, exit on the same 185 * signal, too, in order to reproduce the child's exit status. 186 * However, avoid actually dumping core from the current process. 187 */ 188 if (exitonsig) { 189 if (signal(exitonsig, SIG_DFL) == SIG_ERR) 190 warn("signal"); 191 else { 192 rl.rlim_max = rl.rlim_cur = 0; 193 if (setrlimit(RLIMIT_CORE, &rl) == -1) 194 warn("setrlimit"); 195 kill(getpid(), exitonsig); 196 } 197 } 198 exit (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE); 199} 200 201static void 202usage(void) 203{ 204 fprintf(stderr, 205 "usage: time [-al] [-h | -p] [-o file] utility [argument ...]\n"); 206 exit(1); 207} 208 209/* 210 * Return the frequency of the kernel's statistics clock. 211 */ 212static int 213getstathz(void) 214{ 215 int mib[2]; 216 size_t size; 217 struct clockinfo clockrate; 218 219 mib[0] = CTL_KERN; 220 mib[1] = KERN_CLOCKRATE; 221 size = sizeof clockrate; 222 if (sysctl(mib, 2, &clockrate, &size, NULL, 0) == -1) 223 err(1, "sysctl kern.clockrate"); 224 return clockrate.stathz; 225} 226 227static void 228humantime(FILE *out, long sec, long usec) 229{ 230 long days, hrs, mins; 231 232 days = sec / (60L * 60 * 24); 233 sec %= (60L * 60 * 24); 234 hrs = sec / (60L * 60); 235 sec %= (60L * 60); 236 mins = sec / 60; 237 sec %= 60; 238 239 fprintf(out, "\t"); 240 if (days) 241 fprintf(out, "%ldd", days); 242 if (hrs) 243 fprintf(out, "%ldh", hrs); 244 if (mins) 245 fprintf(out, "%ldm", mins); 246 fprintf(out, "%ld%c%02lds", sec, decimal_point, usec); 247} 248 249static void 250showtime(FILE *out, struct timeval *before, struct timeval *after, 251 struct rusage *ru) 252{ 253 254 after->tv_sec -= before->tv_sec; 255 after->tv_usec -= before->tv_usec; 256 if (after->tv_usec < 0) 257 after->tv_sec--, after->tv_usec += 1000000; 258 259 if (pflag) { 260 /* POSIX wants output that must look like 261 "real %f\nuser %f\nsys %f\n" and requires 262 at least two digits after the radix. */ 263 fprintf(out, "real %jd%c%02ld\n", 264 (intmax_t)after->tv_sec, decimal_point, 265 after->tv_usec/10000); 266 fprintf(out, "user %jd%c%02ld\n", 267 (intmax_t)ru->ru_utime.tv_sec, decimal_point, 268 ru->ru_utime.tv_usec/10000); 269 fprintf(out, "sys %jd%c%02ld\n", 270 (intmax_t)ru->ru_stime.tv_sec, decimal_point, 271 ru->ru_stime.tv_usec/10000); 272 } else if (hflag) { 273 humantime(out, after->tv_sec, after->tv_usec/10000); 274 fprintf(out, " real\t"); 275 humantime(out, ru->ru_utime.tv_sec, ru->ru_utime.tv_usec/10000); 276 fprintf(out, " user\t"); 277 humantime(out, ru->ru_stime.tv_sec, ru->ru_stime.tv_usec/10000); 278 fprintf(out, " sys\n"); 279 } else { 280 fprintf(out, "%9jd%c%02ld real ", 281 (intmax_t)after->tv_sec, decimal_point, 282 after->tv_usec/10000); 283 fprintf(out, "%9jd%c%02ld user ", 284 (intmax_t)ru->ru_utime.tv_sec, decimal_point, 285 ru->ru_utime.tv_usec/10000); 286 fprintf(out, "%9jd%c%02ld sys\n", 287 (intmax_t)ru->ru_stime.tv_sec, decimal_point, 288 ru->ru_stime.tv_usec/10000); 289 } 290} 291 292static void 293siginfo(int sig __unused) 294{ 295 struct timeval after; 296 struct rusage ru; 297 298 (void)gettimeofday(&after, NULL); 299 getrusage(RUSAGE_CHILDREN, &ru); 300 showtime(stdout, &before_tv, &after, &ru); 301} 302