224 lines
6.2 KiB
C
224 lines
6.2 KiB
C
/* $NetBSD: time.c,v 1.24 2020/04/23 07:54:53 simonb Exp $ */
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/*
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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. 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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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1987, 1988, 1993\
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The Regents of the University of California. All rights reserved.");
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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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__RCSID("$NetBSD: time.c,v 1.24 2020/04/23 07:54:53 simonb Exp $");
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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/wait.h>
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#include <errno.h>
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#include <err.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 <unistd.h>
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#include "ext.h"
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__dead static void usage(void);
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static void prl(long, const char *);
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static void prts(const char *, const char *, const struct timespec *,
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const char *);
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static void prtv(const char *, const char *, const struct timeval *,
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const char *);
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int
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main(int argc, char ** volatile argv)
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{
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int pid;
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int ch, status, prec;
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int volatile portableflag;
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int volatile lflag;
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const char *decpt;
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const char *fmt;
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const struct lconv *lconv;
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struct timespec before, after;
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struct rusage ru;
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(void)setlocale(LC_ALL, "");
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lflag = portableflag = 0;
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prec = 1;
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fmt = NULL;
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while ((ch = getopt(argc, argv, "cf:lpt")) != -1) {
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switch (ch) {
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case 'f':
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fmt = optarg;
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portableflag = 0;
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lflag = 0;
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break;
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case 'c': /* csh format */
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fmt = "%Uu %Ss %E %P %X+%Dk %I+%Oio %Fpf+%Ww";
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portableflag = 0;
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lflag = 0;
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break;
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case 'p': /* POSIX.2 format */
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portableflag = 1;
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fmt = NULL;
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lflag = 0;
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break;
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case 'l':
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lflag = 1;
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portableflag = 0;
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fmt = NULL;
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break;
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case 't': /* tcsh format */
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fmt = "%Uu %Ss %E %P\t%X+%Dk %I+%Oio %Fpf+%Ww";
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prec = 3;
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portableflag = 0;
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lflag = 0;
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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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}
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argc -= optind;
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argv += optind;
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if (argc < 1)
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usage();
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(void)clock_gettime(CLOCK_MONOTONIC, &before);
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switch(pid = vfork()) {
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case -1: /* error */
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err(EXIT_FAILURE, "Vfork failed");
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/* NOTREACHED */
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case 0: /* child */
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/* LINTED will return only on failure */
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execvp(*argv, argv);
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err((errno == ENOENT) ? 127 : 126, "Can't exec `%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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if ((pid = wait4(pid, &status, 0, &ru)) == -1)
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err(EXIT_FAILURE, "wait4 %d failed", pid);
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(void)clock_gettime(CLOCK_MONOTONIC, &after);
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if (!WIFEXITED(status))
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warnx("Command terminated abnormally.");
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timespecsub(&after, &before, &after);
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if ((lconv = localeconv()) == NULL ||
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(decpt = lconv->decimal_point) == NULL)
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decpt = ".";
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if (fmt) {
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static struct rusage null_ru;
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before.tv_sec = 0;
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before.tv_nsec = 0;
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prusage1(stderr, fmt, prec, &null_ru, &ru, &after, &before);
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} else if (portableflag) {
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prts("real ", decpt, &after, "\n");
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prtv("user ", decpt, &ru.ru_utime, "\n");
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prtv("sys ", decpt, &ru.ru_stime, "\n");
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} else {
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prts("", decpt, &after, " real ");
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prtv("", decpt, &ru.ru_utime, " user ");
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prtv("", decpt, &ru.ru_stime, " sys\n");
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}
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if (lflag) {
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int hz = (int)sysconf(_SC_CLK_TCK);
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unsigned long long ticks;
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#define SCALE(x) (long)(ticks ? x / ticks : 0)
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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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prl(ru.ru_maxrss, "maximum resident set size");
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prl(SCALE(ru.ru_ixrss), "average shared memory size");
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prl(SCALE(ru.ru_idrss), "average unshared data size");
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prl(SCALE(ru.ru_isrss), "average unshared stack size");
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prl(ru.ru_minflt, "page reclaims");
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prl(ru.ru_majflt, "page faults");
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prl(ru.ru_nswap, "swaps");
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prl(ru.ru_inblock, "block input operations");
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prl(ru.ru_oublock, "block output operations");
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prl(ru.ru_msgsnd, "messages sent");
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prl(ru.ru_msgrcv, "messages received");
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prl(ru.ru_nsignals, "signals received");
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prl(ru.ru_nvcsw, "voluntary context switches");
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prl(ru.ru_nivcsw, "involuntary context switches");
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}
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return (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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(void)fprintf(stderr,
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"Usage: %s [-clpt] [-f <fmt>] utility [argument ...]\n",
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getprogname());
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exit(EXIT_FAILURE);
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}
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static void
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prl(long val, const char *expn)
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{
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(void)fprintf(stderr, "%10ld %s\n", val, expn);
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}
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static void
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prts(const char *pre, const char *decpt, const struct timespec *ts,
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const char *post)
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{
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(void)fprintf(stderr, "%s%9lld%s%02ld%s", pre, (long long)ts->tv_sec,
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decpt, (long)ts->tv_nsec / 10000000, post);
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}
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static void
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prtv(const char *pre, const char *decpt, const struct timeval *tv,
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const char *post)
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{
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(void)fprintf(stderr, "%s%9lld%s%02ld%s", pre, (long long)tv->tv_sec,
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decpt, (long)tv->tv_usec / 10000, post);
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}
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