2 * Copyright (c) 1987, 1988, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
35 static const char copyright[] =
36 "@(#) Copyright (c) 1987, 1988, 1993\n\
37 The Regents of the University of California. All rights reserved.\n";
42 static char sccsid[] = "@(#)time.c 8.1 (Berkeley) 6/6/93";
44 static const char rcsid[] =
48 #include <sys/types.h>
49 #include <sys/resource.h>
50 #include <sys/signal.h>
51 #include <sys/sysctl.h>
64 static int getstathz(void);
65 static void humantime(FILE *, long, long);
66 static void usage(void);
68 static char decimal_point;
71 main(int argc, char **argv)
73 int aflag, ch, hflag, lflag, status, pflag;
78 struct timeval before, after;
82 (void) setlocale(LC_NUMERIC, "");
83 decimal_point = localeconv()->decimal_point[0];
85 aflag = hflag = lflag = pflag = 0;
86 while ((ch = getopt(argc, argv, "ahlo:p")) != -1)
108 if (!(argc -= optind))
113 if ((out = fopen(ofn, aflag ? "a" : "w")) == NULL)
115 setvbuf(out, (char *)NULL, _IONBF, (size_t)0);
118 gettimeofday(&before, (struct timezone *)NULL);
119 switch(pid = fork()) {
127 err(errno == ENOENT ? 127 : 126, "%s", *argv);
131 (void)signal(SIGINT, SIG_IGN);
132 (void)signal(SIGQUIT, SIG_IGN);
133 while (wait4(pid, &status, 0, &ru) != pid);
134 gettimeofday(&after, (struct timezone *)NULL);
135 if ( ! WIFEXITED(status))
136 warnx("command terminated abnormally");
137 exitonsig = WIFSIGNALED(status) ? WTERMSIG(status) : 0;
138 after.tv_sec -= before.tv_sec;
139 after.tv_usec -= before.tv_usec;
140 if (after.tv_usec < 0)
141 after.tv_sec--, after.tv_usec += 1000000;
143 /* POSIX wants output that must look like
144 "real %f\nuser %f\nsys %f\n" and requires
145 at least two digits after the radix. */
146 fprintf(out, "real %ld%c%02ld\n",
147 after.tv_sec, decimal_point,
148 after.tv_usec/10000);
149 fprintf(out, "user %ld%c%02ld\n",
150 ru.ru_utime.tv_sec, decimal_point,
151 ru.ru_utime.tv_usec/10000);
152 fprintf(out, "sys %ld%c%02ld\n",
153 ru.ru_stime.tv_sec, decimal_point,
154 ru.ru_stime.tv_usec/10000);
156 humantime(out, after.tv_sec, after.tv_usec/10000);
157 fprintf(out, " real\t");
158 humantime(out, ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000);
159 fprintf(out, " user\t");
160 humantime(out, ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000);
161 fprintf(out, " sys\n");
163 fprintf(out, "%9ld%c%02ld real ",
164 after.tv_sec, decimal_point,
165 after.tv_usec/10000);
166 fprintf(out, "%9ld%c%02ld user ",
167 ru.ru_utime.tv_sec, decimal_point,
168 ru.ru_utime.tv_usec/10000);
169 fprintf(out, "%9ld%c%02ld sys\n",
170 ru.ru_stime.tv_sec, decimal_point,
171 ru.ru_stime.tv_usec/10000);
174 int hz = getstathz();
177 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) +
178 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000;
181 * If our round-off on the tick calculation still puts us at 0,
182 * then always assume at least one tick.
187 fprintf(out, "%10ld %s\n",
188 ru.ru_maxrss, "maximum resident set size");
189 fprintf(out, "%10ld %s\n",
190 ru.ru_ixrss / ticks, "average shared memory size");
191 fprintf(out, "%10ld %s\n",
192 ru.ru_idrss / ticks, "average unshared data size");
193 fprintf(out, "%10ld %s\n",
194 ru.ru_isrss / ticks, "average unshared stack size");
195 fprintf(out, "%10ld %s\n",
196 ru.ru_minflt, "page reclaims");
197 fprintf(out, "%10ld %s\n",
198 ru.ru_majflt, "page faults");
199 fprintf(out, "%10ld %s\n",
200 ru.ru_nswap, "swaps");
201 fprintf(out, "%10ld %s\n",
202 ru.ru_inblock, "block input operations");
203 fprintf(out, "%10ld %s\n",
204 ru.ru_oublock, "block output operations");
205 fprintf(out, "%10ld %s\n",
206 ru.ru_msgsnd, "messages sent");
207 fprintf(out, "%10ld %s\n",
208 ru.ru_msgrcv, "messages received");
209 fprintf(out, "%10ld %s\n",
210 ru.ru_nsignals, "signals received");
211 fprintf(out, "%10ld %s\n",
212 ru.ru_nvcsw, "voluntary context switches");
213 fprintf(out, "%10ld %s\n",
214 ru.ru_nivcsw, "involuntary context switches");
217 * If the child has exited on a signal, exit on the same
218 * signal, too, in order to reproduce the child's exit status.
219 * However, avoid actually dumping core from the current process.
222 if (signal(exitonsig, SIG_DFL) == SIG_ERR)
225 rl.rlim_max = rl.rlim_cur = 0;
226 if (setrlimit(RLIMIT_CORE, &rl) == -1)
228 kill(getpid(), exitonsig);
231 exit (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE);
238 "usage: time [-al] [-h | -p] [-o file] utility [argument ...]\n");
243 * Return the frequency of the kernel's statistics clock.
250 struct clockinfo clockrate;
253 mib[1] = KERN_CLOCKRATE;
254 size = sizeof clockrate;
255 if (sysctl(mib, 2, &clockrate, &size, NULL, 0) == -1)
256 err(1, "sysctl kern.clockrate");
257 return clockrate.stathz;
261 humantime(FILE *out, long sec, long usec)
263 long days, hrs, mins;
265 days = sec / (60L * 60 * 24);
266 sec %= (60L * 60 * 24);
267 hrs = sec / (60L * 60);
274 fprintf(out, "%ldd", days);
276 fprintf(out, "%ldh", hrs);
278 fprintf(out, "%ldm", mins);
279 fprintf(out, "%ld%c%02lds", sec, decimal_point, usec);