NetBSD/usr.bin/time/time.c

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/* $NetBSD: time.c,v 1.19 2008/07/21 14:19:26 lukem Exp $ */
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/*
* Copyright (c) 1987, 1988, 1993
* The Regents of the University of California. All rights reserved.
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*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 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
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
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#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1987, 1988, 1993\
The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)time.c 8.1 (Berkeley) 6/6/93";
#endif
__RCSID("$NetBSD: time.c,v 1.19 2008/07/21 14:19:26 lukem Exp $");
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#endif /* not lint */
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/wait.h>
#include <errno.h>
#include <err.h>
#include <locale.h>
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#include <signal.h>
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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "ext.h"
int main(int, char **);
static void usage(void);
static void prl(long, const char *);
static void prtv(const char *, const char *, const struct timeval *,
const char *);
int
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main(int argc, char ** volatile argv)
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{
int pid;
int ch, status;
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int volatile portableflag;
int volatile lflag;
int volatile cshflag;
const char *decpt;
const struct lconv *lconv;
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struct timeval before, after;
struct rusage ru;
(void)setlocale(LC_ALL, "");
cshflag = lflag = portableflag = 0;
while ((ch = getopt(argc, argv, "clp")) != -1) {
switch (ch) {
case 'c':
cshflag = 1;
portableflag = 0;
lflag = 0;
break;
case 'p':
portableflag = 1;
cshflag = 0;
lflag = 0;
break;
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case 'l':
lflag = 1;
portableflag = 0;
cshflag = 0;
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break;
case '?':
default:
usage();
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}
}
argc -= optind;
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argv += optind;
if (argc < 1)
usage();
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gettimeofday(&before, (struct timezone *)NULL);
switch(pid = vfork()) {
case -1: /* error */
err(EXIT_FAILURE, "Vfork failed");
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/* NOTREACHED */
case 0: /* child */
/* LINTED will return only on failure */
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execvp(*argv, argv);
err((errno == ENOENT) ? 127 : 126, "Can't exec `%s'", *argv);
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/* NOTREACHED */
}
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/* parent */
(void)signal(SIGINT, SIG_IGN);
(void)signal(SIGQUIT, SIG_IGN);
if ((pid = wait4(pid, &status, 0, &ru)) == -1)
err(EXIT_FAILURE, "wait4 %d failed", pid);
(void)gettimeofday(&after, (struct timezone *)NULL);
if (!WIFEXITED(status))
warnx("Command terminated abnormally.");
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timersub(&after, &before, &after);
if ((lconv = localeconv()) == NULL ||
(decpt = lconv->decimal_point) == NULL)
decpt = ".";
if (cshflag) {
static struct rusage null_ru;
before.tv_sec = 0;
before.tv_usec = 0;
prusage(stderr, &null_ru, &ru, &after, &before);
} else if (portableflag) {
prtv("real ", decpt, &after, "\n");
prtv("user ", decpt, &ru.ru_utime, "\n");
prtv("sys ", decpt, &ru.ru_stime, "\n");
} else {
prtv("", decpt, &after, " real ");
prtv("", decpt, &ru.ru_utime, " user ");
prtv("", decpt, &ru.ru_stime, " sys\n");
}
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if (lflag) {
int hz = (int)sysconf(_SC_CLK_TCK);
unsigned long long ticks;
#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;
prl(ru.ru_maxrss, "maximum resident set size");
prl(SCALE(ru.ru_ixrss), "average shared memory size");
prl(SCALE(ru.ru_idrss), "average unshared data size");
prl(SCALE(ru.ru_isrss), "average unshared stack size");
prl(ru.ru_minflt, "page reclaims");
prl(ru.ru_majflt, "page faults");
prl(ru.ru_nswap, "swaps");
prl(ru.ru_inblock, "block input operations");
prl(ru.ru_oublock, "block output operations");
prl(ru.ru_msgsnd, "messages sent");
prl(ru.ru_msgrcv, "messages received");
prl(ru.ru_nsignals, "signals received");
prl(ru.ru_nvcsw, "voluntary context switches");
prl(ru.ru_nivcsw, "involuntary context switches");
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}
return (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE);
}
static void
usage()
{
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(void)fprintf(stderr, "usage: %s [-clp] utility [argument ...]\n",
getprogname());
exit(EXIT_FAILURE);
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}
static void
prl(long val, const char *expn)
{
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(void)fprintf(stderr, "%10ld %s\n", val, expn);
}
static void
prtv(const char *pre, const char *decpt, const struct timeval *tv,
const char *post)
{
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(void)fprintf(stderr, "%s%9ld%s%02ld%s", pre, (long)tv->tv_sec, decpt,
(long)tv->tv_usec / 10000, post);
}