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/* $NetBSD: time.c,v 1.23 2017/07/15 14:34:08 christos Exp $ */
/*
* Copyright (c) 1987, 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* 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
* 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/types.h>
#include <sys/time.h>
#include <bsd/sys/time.h>
#include <sys/resource.h>
#include <sys/wait.h>
#include <errno.h>
#include <err.h>
#include <locale.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <bsd/stdlib.h>
#include <unistd.h>
#include <time.h>
#include "strpct.h"
static void usage(void);
static void prl(long, const char *);
static void prts(const char *, const char *, const struct timespec *,
const char *);
static void prtv(const char *, const char *, const struct timeval *,
const char *);
void prusage1(FILE *, const char *fmt, struct rusage *, struct rusage *,
struct timespec *, struct timespec *);
static void pdeltat(FILE *fp, struct timeval *t1, struct timeval *t0);
static void pcsecs(FILE *fp, long l);
int
main(int argc, char ** volatile argv)
{
int pid;
int ch, status;
int volatile portableflag;
int volatile lflag;
const char *decpt;
const char *fmt;
const struct lconv *lconv;
struct timespec before, after;
struct rusage ru;
(void)setlocale(LC_ALL, "");
lflag = portableflag = 0;
fmt = NULL;
while ((ch = getopt(argc, argv, "cf:lp")) != -1) {
switch (ch) {
case 'f':
fmt = optarg;
portableflag = 0;
lflag = 0;
break;
case 'c':
fmt = "%Uu %Ss %E %P %X+%Dk %I+%Oio %Fpf+%Ww";
portableflag = 0;
lflag = 0;
break;
case 'p':
portableflag = 1;
fmt = NULL;
lflag = 0;
break;
case 'l':
lflag = 1;
portableflag = 0;
fmt = NULL;
break;
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc < 1)
usage();
(void)clock_gettime(CLOCK_MONOTONIC, &before);
switch(pid = vfork()) {
case -1: /* error */
err(EXIT_FAILURE, "Vfork failed");
/* NOTREACHED */
case 0: /* child */
/* LINTED will return only on failure */
execvp(*argv, argv);
err((errno == ENOENT) ? 127 : 126, "Can't exec `%s'", *argv);
/* NOTREACHED */
}
/* 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)clock_gettime(CLOCK_MONOTONIC, &after);
if (!WIFEXITED(status))
warnx("Command terminated abnormally.");
timespecsub(&after, &before, &after);
if ((lconv = localeconv()) == NULL ||
(decpt = lconv->decimal_point) == NULL)
decpt = ".";
if (fmt) {
static struct rusage null_ru;
before.tv_sec = 0;
before.tv_nsec = 0;
prusage1(stderr, fmt, &null_ru, &ru, &after, &before);
} else if (portableflag) {
prts("real ", decpt, &after, "\n");
prtv("user ", decpt, &ru.ru_utime, "\n");
prtv("sys ", decpt, &ru.ru_stime, "\n");
} else {
prts("", decpt, &after, " real ");
prtv("", decpt, &ru.ru_utime, " user ");
prtv("", decpt, &ru.ru_stime, " sys\n");
}
if (lflag) {
int hz = (int)sysconf(_SC_CLK_TCK);
unsigned long long ticks;
#define SCALE(x) (long)(ticks ? x / ticks : 0)
ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) +
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");
}
return (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE);
}
static void
usage(void)
{
(void)fprintf(stderr, "Usage: %s [-clp] [-f <fmt>] utility [argument ...]\n",
getprogname());
exit(EXIT_FAILURE);
}
static void
prl(long val, const char *expn)
{
(void)fprintf(stderr, "%10ld %s\n", val, expn);
}
static void
prts(const char *pre, const char *decpt, const struct timespec *ts,
const char *post)
{
(void)fprintf(stderr, "%s%9lld%s%02ld%s", pre, (long long)ts->tv_sec,
decpt, (long)ts->tv_nsec / 10000000, post);
}
static void
prtv(const char *pre, const char *decpt, const struct timeval *tv,
const char *post)
{
(void)fprintf(stderr, "%s%9lld%s%02ld%s", pre, (long long)tv->tv_sec,
decpt, (long)tv->tv_usec / 10000, post);
}
void
prusage1(FILE *fp, const char *cp, struct rusage *r0, struct rusage *r1,
struct timespec *e, struct timespec *b)
{
long i;
time_t t;
time_t ms;
ms = (e->tv_sec - b->tv_sec) * 100 + (e->tv_nsec - b->tv_nsec) / 10000000;
t = (r1->ru_utime.tv_sec - r0->ru_utime.tv_sec) * 100 +
(r1->ru_utime.tv_usec - r0->ru_utime.tv_usec) / 10000 +
(r1->ru_stime.tv_sec - r0->ru_stime.tv_sec) * 100 +
(r1->ru_stime.tv_usec - r0->ru_stime.tv_usec) / 10000;
for (; *cp; cp++)
if (*cp != '%')
(void) fputc(*cp, fp);
else if (cp[1])
switch (*++cp) {
case 'D': /* (average) unshared data size */
(void)fprintf(fp, "%ld", t == 0 ? 0L :
(long)((r1->ru_idrss + r1->ru_isrss -
(r0->ru_idrss + r0->ru_isrss)) / t));
break;
case 'E': /* elapsed (wall-clock) time */
pcsecs(fp, (long) ms);
break;
case 'F': /* page faults */
(void)fprintf(fp, "%ld", r1->ru_majflt - r0->ru_majflt);
break;
case 'I': /* FS blocks in */
(void)fprintf(fp, "%ld", r1->ru_inblock - r0->ru_inblock);
break;
case 'K': /* (average) total data memory used */
(void)fprintf(fp, "%ld", t == 0 ? 0L :
(long)(((r1->ru_ixrss + r1->ru_isrss + r1->ru_idrss) -
(r0->ru_ixrss + r0->ru_idrss + r0->ru_isrss)) / t));
break;
case 'M': /* max. Resident Set Size */
(void)fprintf(fp, "%ld", r1->ru_maxrss / 2L);
break;
case 'O': /* FS blocks out */
(void)fprintf(fp, "%ld", r1->ru_oublock - r0->ru_oublock);
break;
case 'P': /* percent time spent running */
/* check if it did not run at all */
if (ms == 0) {
(void)fputs("0.0%", fp);
} else {
char pb[32];
(void)fputs(strpct(pb, sizeof(pb),
(uintmax_t)t, (uintmax_t)ms, 1), fp);
(void)fputc('%', fp);
}
break;
case 'R': /* page reclaims */
(void)fprintf(fp, "%ld", r1->ru_minflt - r0->ru_minflt);
break;
case 'S': /* system CPU time used */
pdeltat(fp, &r1->ru_stime, &r0->ru_stime);
break;
case 'U': /* user CPU time used */
pdeltat(fp, &r1->ru_utime, &r0->ru_utime);
break;
case 'W': /* number of swaps */
i = r1->ru_nswap - r0->ru_nswap;
(void)fprintf(fp, "%ld", i);
break;
case 'X': /* (average) shared text size */
(void)fprintf(fp, "%ld", t == 0 ? 0L :
(long)((r1->ru_ixrss - r0->ru_ixrss) / t));
break;
case 'c': /* num. involuntary context switches */
(void)fprintf(fp, "%ld", r1->ru_nivcsw - r0->ru_nivcsw);
break;
case 'k': /* number of signals received */
(void)fprintf(fp, "%ld", r1->ru_nsignals-r0->ru_nsignals);
break;
case 'r': /* socket messages received */
(void)fprintf(fp, "%ld", r1->ru_msgrcv - r0->ru_msgrcv);
break;
case 's': /* socket messages sent */
(void)fprintf(fp, "%ld", r1->ru_msgsnd - r0->ru_msgsnd);
break;
case 'w': /* num. voluntary context switches (waits) */
(void)fprintf(fp, "%ld", r1->ru_nvcsw - r0->ru_nvcsw);
break;
}
(void)fputc('\n', fp);
}
static void
pdeltat(FILE *fp, struct timeval *t1, struct timeval *t0)
{
struct timeval td;
timersub(t1, t0, &td);
(void)fprintf(fp, "%ld.%01ld", (long)td.tv_sec,
(long)(td.tv_usec / 100000));
}
#define P2DIG(fp, i) (void)fprintf(fp, "%ld%ld", (i) / 10, (i) % 10)
static void
pcsecs(FILE *fp, long l) /* PWP: print mm:ss.dd, l is in sec*100 */
{
long i;
i = l / 360000;
if (i) {
(void)fprintf(fp, "%ld:", i);
i = (l % 360000) / 100;
P2DIG(fp, i / 60);
goto minsec;
}
i = l / 100;
(void)fprintf(fp, "%ld", i / 60);
minsec:
i %= 60;
(void)fputc(':', fp);
P2DIG(fp, i);
(void)fputc('.', fp);
P2DIG(fp, (l % 100));
}
|
