InfoMagic Source Code 1993 July/THE_SOURCE_CODE_CD_ROM.iso/bsd_srcs/usr.bin/time/time.c

C/C++ Source or Header | 1991-04-26 | 4.7 KB | 141 lines

/*
 * Copyright (c) 1987, 1988 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    This product includes software developed by the University of
 *    California, Berkeley and its contributors.
 * 4. 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.
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1987, 1988 The Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)time.c    4.9 (Berkeley) 6/1/90";
#endif /* not lint */

#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/signal.h>
#include <stdio.h>

main(argc, argv)
    int argc;
    char **argv;
{
    extern int optind;
    register int pid;
    int ch, status, lflag;
    struct timeval before, after;
    struct rusage ru;

    lflag = 0;
    while ((ch = getopt(argc, argv, "l")) != EOF)
        switch((char)ch) {
        case 'l':
            lflag = 1;
            break;
        case '?':
        default:
            fprintf(stderr, "usage: time [-l] command.\n");
            exit(1);
        }

    if (!(argc -= optind))
        exit(0);
    argv += optind;

    gettimeofday(&before, (struct timezone *)NULL);
    switch(pid = vfork()) {
    case -1:            /* error */
        perror("time");
        exit(1);
        /* NOTREACHED */
    case 0:                /* child */
        execvp(*argv, argv);
        perror(*argv);
        _exit(1);
        /* NOTREACHED */
    }
    /* parent */
    (void)signal(SIGINT, SIG_IGN);
    (void)signal(SIGQUIT, SIG_IGN);
    while (wait3(&status, 0, &ru) != pid);        /* XXX use waitpid */
    gettimeofday(&after, (struct timezone *)NULL);
    if (status&0377)
        fprintf(stderr, "Command terminated abnormally.\n");
    after.tv_sec -= before.tv_sec;
    after.tv_usec -= before.tv_usec;
    if (after.tv_usec < 0)
        after.tv_sec--, after.tv_usec += 1000000;
    fprintf(stderr, "%9ld.%02ld real ", after.tv_sec, after.tv_usec/10000);
    fprintf(stderr, "%9ld.%02ld user ",
        ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000);
    fprintf(stderr, "%9ld.%02ld sys\n",
        ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000);
    if (lflag) {
        int hz = 100;            /* XXX */
        long ticks;

        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",
            ru.ru_ixrss / ticks, "average shared memory size");
        fprintf(stderr, "%10ld  %s\n",
            ru.ru_idrss / ticks, "average unshared data size");
        fprintf(stderr, "%10ld  %s\n",
            ru.ru_isrss / ticks, "average unshared stack size");
        fprintf(stderr, "%10ld  %s\n",
            ru.ru_minflt, "page reclaims");
        fprintf(stderr, "%10ld  %s\n",
            ru.ru_majflt, "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");
    }
    exit (status>>8);
}