307 lines
8.3 KiB
C
307 lines
8.3 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/resource.h>
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#include <sys/signal.h>
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#include <sys/sysctl.h>
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#include <sys/time.h>
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#include <sys/wait.h>
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#include <err.h>
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#include <errno.h>
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#include <locale.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static int getstathz(void);
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static void humantime(FILE *, long, long);
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static void showtime(FILE *, struct timeval *, struct timeval *,
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struct rusage *);
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static void siginfo(int);
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static void usage(void);
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static char decimal_point;
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static struct timeval before;
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static int hflag, pflag;
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int
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main(int argc, char **argv)
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{
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int aflag, ch, lflag, status;
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int exitonsig;
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pid_t pid;
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struct rlimit rl;
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struct rusage ru;
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struct timeval after;
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char *ofn = NULL;
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FILE *out = stderr;
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(void) setlocale(LC_NUMERIC, "");
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decimal_point = localeconv()->decimal_point[0];
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aflag = hflag = lflag = pflag = 0;
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while ((ch = getopt(argc, argv, "ahlo: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 'h':
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hflag = 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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if (ofn)
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fclose(out);
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execvp(*argv, argv);
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err(errno == ENOENT ? 127 : 126, "%s", *argv);
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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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(void)signal(SIGINFO, siginfo);
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while (wait4(pid, &status, 0, &ru) != pid);
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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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exitonsig = WIFSIGNALED(status) ? WTERMSIG(status) : 0;
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showtime(out, &before, &after, &ru);
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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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/*
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* If the child has exited on a signal, exit on the same
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* signal, too, in order to reproduce the child's exit status.
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* However, avoid actually dumping core from the current process.
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*/
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if (exitonsig) {
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if (signal(exitonsig, SIG_DFL) == SIG_ERR)
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warn("signal");
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else {
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rl.rlim_max = rl.rlim_cur = 0;
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if (setrlimit(RLIMIT_CORE, &rl) == -1)
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warn("setrlimit");
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kill(getpid(), exitonsig);
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}
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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(void)
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{
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fprintf(stderr,
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"usage: time [-al] [-h | -p] [-o file] utility [argument ...]\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(void)
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{
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int mib[2];
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size_t size;
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struct clockinfo clockrate;
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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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static void
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humantime(FILE *out, long sec, long usec)
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{
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long days, hrs, mins;
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days = sec / (60L * 60 * 24);
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sec %= (60L * 60 * 24);
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hrs = sec / (60L * 60);
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sec %= (60L * 60);
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mins = sec / 60;
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sec %= 60;
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fprintf(out, "\t");
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if (days)
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fprintf(out, "%ldd", days);
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if (hrs)
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fprintf(out, "%ldh", hrs);
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if (mins)
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fprintf(out, "%ldm", mins);
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fprintf(out, "%ld%c%02lds", sec, decimal_point, usec);
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}
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static void
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showtime(FILE *out, struct timeval *before, struct timeval *after,
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struct rusage *ru)
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{
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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%c%02ld\n",
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after->tv_sec, decimal_point,
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after->tv_usec/10000);
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fprintf(out, "user %ld%c%02ld\n",
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ru->ru_utime.tv_sec, decimal_point,
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ru->ru_utime.tv_usec/10000);
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fprintf(out, "sys %ld%c%02ld\n",
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ru->ru_stime.tv_sec, decimal_point,
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ru->ru_stime.tv_usec/10000);
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} else if (hflag) {
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humantime(out, after->tv_sec, after->tv_usec/10000);
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fprintf(out, " real\t");
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humantime(out, ru->ru_utime.tv_sec, ru->ru_utime.tv_usec/10000);
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fprintf(out, " user\t");
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humantime(out, ru->ru_stime.tv_sec, ru->ru_stime.tv_usec/10000);
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fprintf(out, " sys\n");
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} else {
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fprintf(out, "%9ld%c%02ld real ",
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after->tv_sec, decimal_point,
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after->tv_usec/10000);
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fprintf(out, "%9ld%c%02ld user ",
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ru->ru_utime.tv_sec, decimal_point,
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ru->ru_utime.tv_usec/10000);
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fprintf(out, "%9ld%c%02ld sys\n",
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ru->ru_stime.tv_sec, decimal_point,
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ru->ru_stime.tv_usec/10000);
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}
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}
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static void
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siginfo(int sig __unused)
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{
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struct timeval after;
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struct rusage ru;
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gettimeofday(&after, (struct timezone *)NULL);
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getrusage(RUSAGE_CHILDREN, &ru);
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showtime(stdout, &before, &after, &ru);
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}
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