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 * 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.
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
31 static const char copyright[] =
32 "@(#) Copyright (c) 1987, 1988, 1993\n\
33 The Regents of the University of California. All rights reserved.\n";
38 static char sccsid[] = "@(#)time.c 8.1 (Berkeley) 6/6/93";
40 static const char rcsid[] =
44 #include <sys/types.h>
45 #include <sys/resource.h>
46 #include <sys/signal.h>
47 #include <sys/sysctl.h>
61 static int getstathz(void);
62 static void humantime(FILE *, long, long);
63 static void showtime(FILE *, struct timeval *, struct timeval *,
65 static void siginfo(int);
66 static void usage(void);
68 static sig_atomic_t siginfo_recvd;
69 static char decimal_point;
70 static struct timeval before_tv;
71 static int hflag, pflag;
74 main(int argc, char **argv)
76 int aflag, ch, lflag, status;
85 (void) setlocale(LC_NUMERIC, "");
86 decimal_point = localeconv()->decimal_point[0];
88 aflag = hflag = lflag = pflag = 0;
89 while ((ch = getopt(argc, argv, "ahlo:p")) != -1)
111 if (!(argc -= optind))
116 if ((out = fopen(ofn, aflag ? "ae" : "we")) == NULL)
118 setvbuf(out, (char *)NULL, _IONBF, (size_t)0);
121 (void)gettimeofday(&before_tv, NULL);
122 switch(pid = fork()) {
128 err(errno == ENOENT ? 127 : 126, "%s", *argv);
132 (void)signal(SIGINT, SIG_IGN);
133 (void)signal(SIGQUIT, SIG_IGN);
135 (void)signal(SIGINFO, siginfo);
136 (void)siginterrupt(SIGINFO, 1);
137 while (wait4(pid, &status, 0, &ru) != pid) {
140 (void)gettimeofday(&after, NULL);
141 getrusage(RUSAGE_CHILDREN, &ru);
142 showtime(stdout, &before_tv, &after, &ru);
145 (void)gettimeofday(&after, NULL);
146 if ( ! WIFEXITED(status))
147 warnx("command terminated abnormally");
148 exitonsig = WIFSIGNALED(status) ? WTERMSIG(status) : 0;
149 showtime(out, &before_tv, &after, &ru);
151 int hz = getstathz();
154 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) +
155 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000;
158 * If our round-off on the tick calculation still puts us at 0,
159 * then always assume at least one tick.
164 fprintf(out, "%10ld %s\n",
165 ru.ru_maxrss, "maximum resident set size");
166 fprintf(out, "%10ld %s\n",
167 ru.ru_ixrss / ticks, "average shared memory size");
168 fprintf(out, "%10ld %s\n",
169 ru.ru_idrss / ticks, "average unshared data size");
170 fprintf(out, "%10ld %s\n",
171 ru.ru_isrss / ticks, "average unshared stack size");
172 fprintf(out, "%10ld %s\n",
173 ru.ru_minflt, "page reclaims");
174 fprintf(out, "%10ld %s\n",
175 ru.ru_majflt, "page faults");
176 fprintf(out, "%10ld %s\n",
177 ru.ru_nswap, "swaps");
178 fprintf(out, "%10ld %s\n",
179 ru.ru_inblock, "block input operations");
180 fprintf(out, "%10ld %s\n",
181 ru.ru_oublock, "block output operations");
182 fprintf(out, "%10ld %s\n",
183 ru.ru_msgsnd, "messages sent");
184 fprintf(out, "%10ld %s\n",
185 ru.ru_msgrcv, "messages received");
186 fprintf(out, "%10ld %s\n",
187 ru.ru_nsignals, "signals received");
188 fprintf(out, "%10ld %s\n",
189 ru.ru_nvcsw, "voluntary context switches");
190 fprintf(out, "%10ld %s\n",
191 ru.ru_nivcsw, "involuntary context switches");
194 * If the child has exited on a signal, exit on the same
195 * signal, too, in order to reproduce the child's exit status.
196 * However, avoid actually dumping core from the current process.
199 if (signal(exitonsig, SIG_DFL) == SIG_ERR)
202 rl.rlim_max = rl.rlim_cur = 0;
203 if (setrlimit(RLIMIT_CORE, &rl) == -1)
205 kill(getpid(), exitonsig);
208 exit (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE);
215 "usage: time [-al] [-h | -p] [-o file] utility [argument ...]\n");
220 * Return the frequency of the kernel's statistics clock.
227 struct clockinfo clockrate;
230 mib[1] = KERN_CLOCKRATE;
231 size = sizeof clockrate;
232 if (sysctl(mib, 2, &clockrate, &size, NULL, 0) == -1)
233 err(1, "sysctl kern.clockrate");
234 return clockrate.stathz;
238 humantime(FILE *out, long sec, long usec)
240 long days, hrs, mins;
242 days = sec / (60L * 60 * 24);
243 sec %= (60L * 60 * 24);
244 hrs = sec / (60L * 60);
251 fprintf(out, "%ldd", days);
253 fprintf(out, "%ldh", hrs);
255 fprintf(out, "%ldm", mins);
256 fprintf(out, "%ld%c%02lds", sec, decimal_point, usec);
260 showtime(FILE *out, struct timeval *before, struct timeval *after,
264 after->tv_sec -= before->tv_sec;
265 after->tv_usec -= before->tv_usec;
266 if (after->tv_usec < 0)
267 after->tv_sec--, after->tv_usec += 1000000;
270 /* POSIX wants output that must look like
271 "real %f\nuser %f\nsys %f\n" and requires
272 at least two digits after the radix. */
273 fprintf(out, "real %jd%c%02ld\n",
274 (intmax_t)after->tv_sec, decimal_point,
275 after->tv_usec/10000);
276 fprintf(out, "user %jd%c%02ld\n",
277 (intmax_t)ru->ru_utime.tv_sec, decimal_point,
278 ru->ru_utime.tv_usec/10000);
279 fprintf(out, "sys %jd%c%02ld\n",
280 (intmax_t)ru->ru_stime.tv_sec, decimal_point,
281 ru->ru_stime.tv_usec/10000);
283 humantime(out, after->tv_sec, after->tv_usec/10000);
284 fprintf(out, " real\t");
285 humantime(out, ru->ru_utime.tv_sec, ru->ru_utime.tv_usec/10000);
286 fprintf(out, " user\t");
287 humantime(out, ru->ru_stime.tv_sec, ru->ru_stime.tv_usec/10000);
288 fprintf(out, " sys\n");
290 fprintf(out, "%9jd%c%02ld real ",
291 (intmax_t)after->tv_sec, decimal_point,
292 after->tv_usec/10000);
293 fprintf(out, "%9jd%c%02ld user ",
294 (intmax_t)ru->ru_utime.tv_sec, decimal_point,
295 ru->ru_utime.tv_usec/10000);
296 fprintf(out, "%9jd%c%02ld sys\n",
297 (intmax_t)ru->ru_stime.tv_sec, decimal_point,
298 ru->ru_stime.tv_usec/10000);
303 siginfo(int sig __unused)