usr/src/usr.bin/time/time.c

/*
 * 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);
}