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time.c revision 1.1
      1  1.1  cgd /*
      2  1.1  cgd  * Copyright (c) 1987, 1988 The Regents of the University of California.
      3  1.1  cgd  * All rights reserved.
      4  1.1  cgd  *
      5  1.1  cgd  * Redistribution and use in source and binary forms, with or without
      6  1.1  cgd  * modification, are permitted provided that the following conditions
      7  1.1  cgd  * are met:
      8  1.1  cgd  * 1. Redistributions of source code must retain the above copyright
      9  1.1  cgd  *    notice, this list of conditions and the following disclaimer.
     10  1.1  cgd  * 2. Redistributions in binary form must reproduce the above copyright
     11  1.1  cgd  *    notice, this list of conditions and the following disclaimer in the
     12  1.1  cgd  *    documentation and/or other materials provided with the distribution.
     13  1.1  cgd  * 3. All advertising materials mentioning features or use of this software
     14  1.1  cgd  *    must display the following acknowledgement:
     15  1.1  cgd  *	This product includes software developed by the University of
     16  1.1  cgd  *	California, Berkeley and its contributors.
     17  1.1  cgd  * 4. Neither the name of the University nor the names of its contributors
     18  1.1  cgd  *    may be used to endorse or promote products derived from this software
     19  1.1  cgd  *    without specific prior written permission.
     20  1.1  cgd  *
     21  1.1  cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  1.1  cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  1.1  cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  1.1  cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  1.1  cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  1.1  cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  1.1  cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  1.1  cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  1.1  cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  1.1  cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  1.1  cgd  * SUCH DAMAGE.
     32  1.1  cgd  */
     33  1.1  cgd 
     34  1.1  cgd #ifndef lint
     35  1.1  cgd char copyright[] =
     36  1.1  cgd "@(#) Copyright (c) 1987, 1988 The Regents of the University of California.\n\
     37  1.1  cgd  All rights reserved.\n";
     38  1.1  cgd #endif /* not lint */
     39  1.1  cgd 
     40  1.1  cgd #ifndef lint
     41  1.1  cgd static char sccsid[] = "@(#)time.c	4.9 (Berkeley) 6/1/90";
     42  1.1  cgd #endif /* not lint */
     43  1.1  cgd 
     44  1.1  cgd #include <sys/types.h>
     45  1.1  cgd #include <sys/time.h>
     46  1.1  cgd #include <sys/resource.h>
     47  1.1  cgd #include <sys/signal.h>
     48  1.1  cgd #include <stdio.h>
     49  1.1  cgd 
     50  1.1  cgd main(argc, argv)
     51  1.1  cgd 	int argc;
     52  1.1  cgd 	char **argv;
     53  1.1  cgd {
     54  1.1  cgd 	extern int optind;
     55  1.1  cgd 	register int pid;
     56  1.1  cgd 	int ch, status, lflag;
     57  1.1  cgd 	struct timeval before, after;
     58  1.1  cgd 	struct rusage ru;
     59  1.1  cgd 
     60  1.1  cgd 	lflag = 0;
     61  1.1  cgd 	while ((ch = getopt(argc, argv, "l")) != EOF)
     62  1.1  cgd 		switch((char)ch) {
     63  1.1  cgd 		case 'l':
     64  1.1  cgd 			lflag = 1;
     65  1.1  cgd 			break;
     66  1.1  cgd 		case '?':
     67  1.1  cgd 		default:
     68  1.1  cgd 			fprintf(stderr, "usage: time [-l] command.\n");
     69  1.1  cgd 			exit(1);
     70  1.1  cgd 		}
     71  1.1  cgd 
     72  1.1  cgd 	if (!(argc -= optind))
     73  1.1  cgd 		exit(0);
     74  1.1  cgd 	argv += optind;
     75  1.1  cgd 
     76  1.1  cgd 	gettimeofday(&before, (struct timezone *)NULL);
     77  1.1  cgd 	switch(pid = vfork()) {
     78  1.1  cgd 	case -1:			/* error */
     79  1.1  cgd 		perror("time");
     80  1.1  cgd 		exit(1);
     81  1.1  cgd 		/* NOTREACHED */
     82  1.1  cgd 	case 0:				/* child */
     83  1.1  cgd 		execvp(*argv, argv);
     84  1.1  cgd 		perror(*argv);
     85  1.1  cgd 		_exit(1);
     86  1.1  cgd 		/* NOTREACHED */
     87  1.1  cgd 	}
     88  1.1  cgd 	/* parent */
     89  1.1  cgd 	(void)signal(SIGINT, SIG_IGN);
     90  1.1  cgd 	(void)signal(SIGQUIT, SIG_IGN);
     91  1.1  cgd 	while (wait3(&status, 0, &ru) != pid);		/* XXX use waitpid */
     92  1.1  cgd 	gettimeofday(&after, (struct timezone *)NULL);
     93  1.1  cgd 	if (status&0377)
     94  1.1  cgd 		fprintf(stderr, "Command terminated abnormally.\n");
     95  1.1  cgd 	after.tv_sec -= before.tv_sec;
     96  1.1  cgd 	after.tv_usec -= before.tv_usec;
     97  1.1  cgd 	if (after.tv_usec < 0)
     98  1.1  cgd 		after.tv_sec--, after.tv_usec += 1000000;
     99  1.1  cgd 	fprintf(stderr, "%9ld.%02ld real ", after.tv_sec, after.tv_usec/10000);
    100  1.1  cgd 	fprintf(stderr, "%9ld.%02ld user ",
    101  1.1  cgd 	    ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000);
    102  1.1  cgd 	fprintf(stderr, "%9ld.%02ld sys\n",
    103  1.1  cgd 	    ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000);
    104  1.1  cgd 	if (lflag) {
    105  1.1  cgd 		int hz = 100;			/* XXX */
    106  1.1  cgd 		long ticks;
    107  1.1  cgd 
    108  1.1  cgd 		ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) +
    109  1.1  cgd 		     hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000;
    110  1.1  cgd 		fprintf(stderr, "%10ld  %s\n",
    111  1.1  cgd 			ru.ru_maxrss, "maximum resident set size");
    112  1.1  cgd 		fprintf(stderr, "%10ld  %s\n",
    113  1.1  cgd 			ru.ru_ixrss / ticks, "average shared memory size");
    114  1.1  cgd 		fprintf(stderr, "%10ld  %s\n",
    115  1.1  cgd 			ru.ru_idrss / ticks, "average unshared data size");
    116  1.1  cgd 		fprintf(stderr, "%10ld  %s\n",
    117  1.1  cgd 			ru.ru_isrss / ticks, "average unshared stack size");
    118  1.1  cgd 		fprintf(stderr, "%10ld  %s\n",
    119  1.1  cgd 			ru.ru_minflt, "page reclaims");
    120  1.1  cgd 		fprintf(stderr, "%10ld  %s\n",
    121  1.1  cgd 			ru.ru_majflt, "page faults");
    122  1.1  cgd 		fprintf(stderr, "%10ld  %s\n",
    123  1.1  cgd 			ru.ru_nswap, "swaps");
    124  1.1  cgd 		fprintf(stderr, "%10ld  %s\n",
    125  1.1  cgd 			ru.ru_inblock, "block input operations");
    126  1.1  cgd 		fprintf(stderr, "%10ld  %s\n",
    127  1.1  cgd 			ru.ru_oublock, "block output operations");
    128  1.1  cgd 		fprintf(stderr, "%10ld  %s\n",
    129  1.1  cgd 			ru.ru_msgsnd, "messages sent");
    130  1.1  cgd 		fprintf(stderr, "%10ld  %s\n",
    131  1.1  cgd 			ru.ru_msgrcv, "messages received");
    132  1.1  cgd 		fprintf(stderr, "%10ld  %s\n",
    133  1.1  cgd 			ru.ru_nsignals, "signals received");
    134  1.1  cgd 		fprintf(stderr, "%10ld  %s\n",
    135  1.1  cgd 			ru.ru_nvcsw, "voluntary context switches");
    136  1.1  cgd 		fprintf(stderr, "%10ld  %s\n",
    137  1.1  cgd 			ru.ru_nivcsw, "involuntary context switches");
    138  1.1  cgd 	}
    139  1.1  cgd 	exit (status>>8);
    140  1.1  cgd }
    141