2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1987, 1988, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 static const char copyright[] =
34 "@(#) Copyright (c) 1987, 1988, 1993\n\
35 The Regents of the University of California. All rights reserved.\n";
40 static char sccsid[] = "@(#)time.c 8.1 (Berkeley) 6/6/93";
42 static const char rcsid[] =
46 #include <sys/types.h>
47 #include <sys/resource.h>
48 #include <sys/signal.h>
49 #include <sys/sysctl.h>
64 static int getstathz(void);
65 static void humantime(FILE *, long, long);
66 static void showtime(FILE *, struct timespec *, struct timespec *,
68 static void siginfo(int);
69 static void usage(void);
71 static sig_atomic_t siginfo_recvd;
72 static char decimal_point;
73 static struct timespec before_ts;
74 static int hflag, pflag;
77 main(int argc, char **argv)
79 int aflag, ch, lflag, status;
84 struct timespec after;
88 (void) setlocale(LC_NUMERIC, "");
89 decimal_point = localeconv()->decimal_point[0];
91 aflag = hflag = lflag = pflag = 0;
92 while ((ch = getopt(argc, argv, "ahlo:p")) != -1)
114 if (!(argc -= optind))
119 if ((out = fopen(ofn, aflag ? "ae" : "we")) == NULL)
121 setvbuf(out, (char *)NULL, _IONBF, (size_t)0);
124 if (clock_gettime(CLOCK_MONOTONIC, &before_ts))
125 err(1, "clock_gettime");
126 switch(pid = fork()) {
132 err(errno == ENOENT ? 127 : 126, "%s", *argv);
136 (void)signal(SIGINT, SIG_IGN);
137 (void)signal(SIGQUIT, SIG_IGN);
139 (void)signal(SIGINFO, siginfo);
140 (void)siginterrupt(SIGINFO, 1);
141 while (wait4(pid, &status, 0, &ru) != pid) {
144 if (clock_gettime(CLOCK_MONOTONIC, &after))
145 err(1, "clock_gettime");
146 getrusage(RUSAGE_CHILDREN, &ru);
147 showtime(stdout, &before_ts, &after, &ru);
150 if (clock_gettime(CLOCK_MONOTONIC, &after))
151 err(1, "clock_gettime");
152 if ( ! WIFEXITED(status))
153 warnx("command terminated abnormally");
154 exitonsig = WIFSIGNALED(status) ? WTERMSIG(status) : 0;
155 showtime(out, &before_ts, &after, &ru);
157 int hz = getstathz();
160 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) +
161 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000;
164 * If our round-off on the tick calculation still puts us at 0,
165 * then always assume at least one tick.
170 fprintf(out, "%10ld %s\n",
171 ru.ru_maxrss, "maximum resident set size");
172 fprintf(out, "%10ld %s\n",
173 ru.ru_ixrss / ticks, "average shared memory size");
174 fprintf(out, "%10ld %s\n",
175 ru.ru_idrss / ticks, "average unshared data size");
176 fprintf(out, "%10ld %s\n",
177 ru.ru_isrss / ticks, "average unshared stack size");
178 fprintf(out, "%10ld %s\n",
179 ru.ru_minflt, "page reclaims");
180 fprintf(out, "%10ld %s\n",
181 ru.ru_majflt, "page faults");
182 fprintf(out, "%10ld %s\n",
183 ru.ru_nswap, "swaps");
184 fprintf(out, "%10ld %s\n",
185 ru.ru_inblock, "block input operations");
186 fprintf(out, "%10ld %s\n",
187 ru.ru_oublock, "block output operations");
188 fprintf(out, "%10ld %s\n",
189 ru.ru_msgsnd, "messages sent");
190 fprintf(out, "%10ld %s\n",
191 ru.ru_msgrcv, "messages received");
192 fprintf(out, "%10ld %s\n",
193 ru.ru_nsignals, "signals received");
194 fprintf(out, "%10ld %s\n",
195 ru.ru_nvcsw, "voluntary context switches");
196 fprintf(out, "%10ld %s\n",
197 ru.ru_nivcsw, "involuntary context switches");
200 * If the child has exited on a signal, exit on the same
201 * signal, too, in order to reproduce the child's exit status.
202 * However, avoid actually dumping core from the current process.
205 if (signal(exitonsig, SIG_DFL) == SIG_ERR)
208 rl.rlim_max = rl.rlim_cur = 0;
209 if (setrlimit(RLIMIT_CORE, &rl) == -1)
211 kill(getpid(), exitonsig);
214 exit (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE);
221 "usage: time [-al] [-h | -p] [-o file] utility [argument ...]\n");
226 * Return the frequency of the kernel's statistics clock.
233 struct clockinfo clockrate;
236 mib[1] = KERN_CLOCKRATE;
237 size = sizeof clockrate;
238 if (sysctl(mib, 2, &clockrate, &size, NULL, 0) == -1)
239 err(1, "sysctl kern.clockrate");
240 return clockrate.stathz;
244 humantime(FILE *out, long sec, long centisec)
246 long days, hrs, mins;
248 days = sec / (60L * 60 * 24);
249 sec %= (60L * 60 * 24);
250 hrs = sec / (60L * 60);
257 fprintf(out, "%ldd", days);
259 fprintf(out, "%ldh", hrs);
261 fprintf(out, "%ldm", mins);
262 fprintf(out, "%ld%c%02lds", sec, decimal_point, centisec);
266 showtime(FILE *out, struct timespec *before, struct timespec *after,
270 after->tv_sec -= before->tv_sec;
271 after->tv_nsec -= before->tv_nsec;
272 if (after->tv_nsec < 0)
273 after->tv_sec--, after->tv_nsec += 1000000000;
276 /* POSIX wants output that must look like
277 "real %f\nuser %f\nsys %f\n" and requires
278 at least two digits after the radix. */
279 fprintf(out, "real %jd%c%02ld\n",
280 (intmax_t)after->tv_sec, decimal_point,
281 after->tv_nsec/10000000);
282 fprintf(out, "user %jd%c%02ld\n",
283 (intmax_t)ru->ru_utime.tv_sec, decimal_point,
284 ru->ru_utime.tv_usec/10000);
285 fprintf(out, "sys %jd%c%02ld\n",
286 (intmax_t)ru->ru_stime.tv_sec, decimal_point,
287 ru->ru_stime.tv_usec/10000);
289 humantime(out, after->tv_sec, after->tv_nsec/10000000);
290 fprintf(out, " real\t");
291 humantime(out, ru->ru_utime.tv_sec, ru->ru_utime.tv_usec/10000);
292 fprintf(out, " user\t");
293 humantime(out, ru->ru_stime.tv_sec, ru->ru_stime.tv_usec/10000);
294 fprintf(out, " sys\n");
296 fprintf(out, "%9jd%c%02ld real ",
297 (intmax_t)after->tv_sec, decimal_point,
298 after->tv_nsec/10000000);
299 fprintf(out, "%9jd%c%02ld user ",
300 (intmax_t)ru->ru_utime.tv_sec, decimal_point,
301 ru->ru_utime.tv_usec/10000);
302 fprintf(out, "%9jd%c%02ld sys\n",
303 (intmax_t)ru->ru_stime.tv_sec, decimal_point,
304 ru->ru_stime.tv_usec/10000);
309 siginfo(int sig __unused)