fbbd9655e5
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
308 lines
8.2 KiB
C
308 lines
8.2 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. 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 <stdint.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 sig_atomic_t siginfo_recvd;
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static char decimal_point;
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static struct timeval before_tv;
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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 ? "ae" : "we")) == 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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(void)gettimeofday(&before_tv, 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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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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siginfo_recvd = 0;
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(void)signal(SIGINFO, siginfo);
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(void)siginterrupt(SIGINFO, 1);
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while (wait4(pid, &status, 0, &ru) != pid) {
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if (siginfo_recvd) {
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siginfo_recvd = 0;
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(void)gettimeofday(&after, NULL);
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getrusage(RUSAGE_CHILDREN, &ru);
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showtime(stdout, &before_tv, &after, &ru);
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}
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}
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(void)gettimeofday(&after, 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_tv, &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 %jd%c%02ld\n",
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(intmax_t)after->tv_sec, decimal_point,
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after->tv_usec/10000);
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fprintf(out, "user %jd%c%02ld\n",
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(intmax_t)ru->ru_utime.tv_sec, decimal_point,
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ru->ru_utime.tv_usec/10000);
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fprintf(out, "sys %jd%c%02ld\n",
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(intmax_t)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, "%9jd%c%02ld real ",
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(intmax_t)after->tv_sec, decimal_point,
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after->tv_usec/10000);
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fprintf(out, "%9jd%c%02ld user ",
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(intmax_t)ru->ru_utime.tv_sec, decimal_point,
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ru->ru_utime.tv_usec/10000);
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fprintf(out, "%9jd%c%02ld sys\n",
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(intmax_t)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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siginfo_recvd = 1;
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}
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