File: [local] / src / usr.bin / time / time.c (download)
Revision 1.25, Mon Aug 21 13:38:02 2017 UTC (6 years, 9 months ago) by schwarze
Branch: MAIN
CVS Tags: OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, OPENBSD_7_2_BASE, OPENBSD_7_2, OPENBSD_7_1_BASE, OPENBSD_7_1, OPENBSD_7_0_BASE, OPENBSD_7_0, OPENBSD_6_9_BASE, OPENBSD_6_9, OPENBSD_6_8_BASE, OPENBSD_6_8, OPENBSD_6_7_BASE, OPENBSD_6_7, OPENBSD_6_6_BASE, OPENBSD_6_6, OPENBSD_6_5_BASE, OPENBSD_6_5, OPENBSD_6_4_BASE, OPENBSD_6_4, OPENBSD_6_3_BASE, OPENBSD_6_3, OPENBSD_6_2_BASE, OPENBSD_6_2 Changes since 1.24: +7 -10 lines
Minor cleanup, joint work with Scott Cheloha <scottcheloha at gmail dot com>:
* Delete bogus error message and correct exit status when dying from SIGKILL.
* Prefer warn(3) over perror(3) for clarity.
* Return from main() rather than exit(3).
* Simplify kill(getpid(), ...) to raise(...).
* Drop obvious /* NOTREACHED */.
No objections raised when shown on tech@.
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/* $OpenBSD: time.c,v 1.25 2017/08/21 13:38:02 schwarze Exp $ */
/* $NetBSD: time.c,v 1.7 1995/06/27 00:34:00 jtc 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/time.h>
#include <sys/resource.h>
#include <sys/wait.h>
#include <sys/sysctl.h>
#include <err.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
__dead void usage(void);
int
main(int argc, char *argv[])
{
struct rusage ru;
struct timespec before, after, during;
int ch, exitonsig, lflag, portableflag, status;
pid_t pid;
if (pledge("stdio proc exec", NULL) == -1)
err(1, "pledge");
exitonsig = lflag = portableflag = 0;
while ((ch = getopt(argc, argv, "lp")) != -1) {
switch(ch) {
case 'l':
lflag = 1;
break;
case 'p':
portableflag = 1;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc < 1)
usage();
clock_gettime(CLOCK_MONOTONIC, &before);
switch(pid = vfork()) {
case -1: /* error */
warn("fork");
return 1;
case 0: /* child */
execvp(*argv, argv);
warn("%s", *argv);
_exit((errno == ENOENT) ? 127 : 126);
}
/* parent */
signal(SIGINT, SIG_IGN);
signal(SIGQUIT, SIG_IGN);
while (wait3(&status, 0, &ru) != pid)
;
clock_gettime(CLOCK_MONOTONIC, &after);
if (WIFSIGNALED(status))
exitonsig = WTERMSIG(status);
if (!WIFEXITED(status))
fprintf(stderr, "Command terminated abnormally.\n");
timespecsub(&after, &before, &during);
if (portableflag) {
fprintf(stderr, "real %9lld.%02ld\n",
(long long)during.tv_sec, during.tv_nsec/10000000);
fprintf(stderr, "user %9lld.%02ld\n",
(long long)ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000);
fprintf(stderr, "sys %9lld.%02ld\n",
(long long)ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000);
} else {
fprintf(stderr, "%9lld.%02ld real ",
(long long)during.tv_sec, during.tv_nsec/10000000);
fprintf(stderr, "%9lld.%02ld user ",
(long long)ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000);
fprintf(stderr, "%9lld.%02ld sys\n",
(long long)ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000);
}
if (lflag) {
int hz;
long ticks;
int mib[2];
struct clockinfo clkinfo;
size_t size;
mib[0] = CTL_KERN;
mib[1] = KERN_CLOCKRATE;
size = sizeof(clkinfo);
if (sysctl(mib, 2, &clkinfo, &size, NULL, 0) < 0)
err(1, "sysctl");
hz = clkinfo.hz;
ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) +
hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000;
fprintf(stderr, "%10ld %s\n",
ru.ru_maxrss, "maximum resident set size");
fprintf(stderr, "%10ld %s\n", ticks ? ru.ru_ixrss / ticks : 0,
"average shared memory size");
fprintf(stderr, "%10ld %s\n", ticks ? ru.ru_idrss / ticks : 0,
"average unshared data size");
fprintf(stderr, "%10ld %s\n", ticks ? ru.ru_isrss / ticks : 0,
"average unshared stack size");
fprintf(stderr, "%10ld %s\n",
ru.ru_minflt, "minor page faults");
fprintf(stderr, "%10ld %s\n",
ru.ru_majflt, "major page faults");
fprintf(stderr, "%10ld %s\n",
ru.ru_nswap, "swaps");
fprintf(stderr, "%10ld %s\n",
ru.ru_inblock, "block input operations");
fprintf(stderr, "%10ld %s\n",
ru.ru_oublock, "block output operations");
fprintf(stderr, "%10ld %s\n",
ru.ru_msgsnd, "messages sent");
fprintf(stderr, "%10ld %s\n",
ru.ru_msgrcv, "messages received");
fprintf(stderr, "%10ld %s\n",
ru.ru_nsignals, "signals received");
fprintf(stderr, "%10ld %s\n",
ru.ru_nvcsw, "voluntary context switches");
fprintf(stderr, "%10ld %s\n",
ru.ru_nivcsw, "involuntary context switches");
}
if (exitonsig) {
if (signal(exitonsig, SIG_DFL) == SIG_ERR)
return 128 + exitonsig;
else
raise(exitonsig);
}
return WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE;
}
__dead void
usage(void)
{
fprintf(stderr, "usage: %s [-lp] utility [argument ...]\n",
getprogname());
exit(1);
}