234 lines
6.6 KiB
C
234 lines
6.6 KiB
C
/*
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* Copyright (c) 1987, 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1987, 1988, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)time.c 8.1 (Berkeley) 6/6/93";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/signal.h>
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#include <sys/sysctl.h>
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#include <stdlib.h>
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#include <sys/wait.h>
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#include <err.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <signal.h>
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static int getstathz __P((void));
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static void usage __P((void));
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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extern char *optarg;
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extern int optind;
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register int pid;
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int aflag, ch, lflag, status, pflag;
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struct timeval before, after;
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struct rusage ru;
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FILE *out = stderr;
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char *ofn = NULL;
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int exitonsig = 0; /* Die with same signal as child */
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aflag = lflag = pflag = 0;
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while ((ch = getopt(argc, argv, "alo:p")) != -1)
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switch((char)ch) {
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case 'a':
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aflag = 1;
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break;
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case 'l':
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lflag = 1;
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break;
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case 'o':
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ofn = optarg;
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break;
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case 'p':
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pflag = 1;
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break;
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case '?':
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default:
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usage();
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}
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if (!(argc -= optind))
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exit(0);
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argv += optind;
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if (ofn) {
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if ((out = fopen(ofn, aflag ? "a" : "w")) == NULL)
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err(1, "%s", ofn);
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setvbuf(out, (char *)NULL, _IONBF, (size_t)0);
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}
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gettimeofday(&before, (struct timezone *)NULL);
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switch(pid = fork()) {
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case -1: /* error */
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err(1, "time");
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/* NOTREACHED */
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case 0: /* child */
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errno = 0;
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execvp(*argv, argv);
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warn("%s", *argv);
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if (errno == ENOENT)
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_exit(127); /* POSIX: utility could not be found */
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else
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_exit(126); /* POSIX: utility could not be invoked */
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/* NOTREACHED */
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}
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/* parent */
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(void)signal(SIGINT, SIG_IGN);
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(void)signal(SIGQUIT, SIG_IGN);
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while (wait3(&status, 0, &ru) != pid); /* XXX use waitpid */
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gettimeofday(&after, (struct timezone *)NULL);
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if ( ! WIFEXITED(status))
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warnx("command terminated abnormally");
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if (WIFSIGNALED(status))
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exitonsig = WTERMSIG(status);
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after.tv_sec -= before.tv_sec;
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after.tv_usec -= before.tv_usec;
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if (after.tv_usec < 0)
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after.tv_sec--, after.tv_usec += 1000000;
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if (pflag) {
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/* POSIX wants output that must look like
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"real %f\nuser %f\nsys %f\n" and requires
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at least two digits after the radix. */
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fprintf(out, "real %ld.%02ld\n",
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after.tv_sec, after.tv_usec/10000);
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fprintf(out, "user %ld.%02ld\n",
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ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000);
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fprintf(out, "sys %ld.%02ld\n",
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ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000);
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} else {
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fprintf(out, "%9ld.%02ld real ",
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after.tv_sec, after.tv_usec/10000);
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fprintf(out, "%9ld.%02ld user ",
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ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000);
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fprintf(out, "%9ld.%02ld sys\n",
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ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000);
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}
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if (lflag) {
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int hz = getstathz();
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u_long ticks;
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ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) +
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hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000;
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/*
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* If our round-off on the tick calculation still puts us at 0,
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* then always assume at least one tick.
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*/
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if (ticks == 0)
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ticks = 1;
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fprintf(out, "%10ld %s\n",
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ru.ru_maxrss, "maximum resident set size");
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fprintf(out, "%10ld %s\n",
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ru.ru_ixrss / ticks, "average shared memory size");
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fprintf(out, "%10ld %s\n",
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ru.ru_idrss / ticks, "average unshared data size");
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fprintf(out, "%10ld %s\n",
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ru.ru_isrss / ticks, "average unshared stack size");
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fprintf(out, "%10ld %s\n",
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ru.ru_minflt, "page reclaims");
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fprintf(out, "%10ld %s\n",
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ru.ru_majflt, "page faults");
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fprintf(out, "%10ld %s\n",
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ru.ru_nswap, "swaps");
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fprintf(out, "%10ld %s\n",
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ru.ru_inblock, "block input operations");
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fprintf(out, "%10ld %s\n",
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ru.ru_oublock, "block output operations");
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fprintf(out, "%10ld %s\n",
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ru.ru_msgsnd, "messages sent");
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fprintf(out, "%10ld %s\n",
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ru.ru_msgrcv, "messages received");
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fprintf(out, "%10ld %s\n",
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ru.ru_nsignals, "signals received");
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fprintf(out, "%10ld %s\n",
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ru.ru_nvcsw, "voluntary context switches");
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fprintf(out, "%10ld %s\n",
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ru.ru_nivcsw, "involuntary context switches");
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}
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if (exitonsig) {
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if (signal(exitonsig, SIG_DFL) < 0)
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perror("signal");
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else
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kill(getpid(), exitonsig);
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}
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exit (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE);
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}
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static void
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usage()
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{
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fprintf(stderr, "usage: time [-alp] [-o file] command\n");
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exit(1);
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}
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/*
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* Return the frequency of the kernel's statistics clock.
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*/
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static int
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getstathz()
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{
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struct clockinfo clockrate;
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int mib[2];
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size_t size;
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mib[0] = CTL_KERN;
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mib[1] = KERN_CLOCKRATE;
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size = sizeof clockrate;
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if (sysctl(mib, 2, &clockrate, &size, NULL, 0) == -1)
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err(1, "sysctl kern.clockrate");
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return clockrate.stathz;
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}
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