text: /*	$NetBSD: time.c,v 1.9 1997/10/20 03:28:21 lukem 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. 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.
   */
  
  #include <sys/cdefs.h>
  #ifndef lint
  __COPYRIGHT("@(#) Copyright (c) 1987, 1988, 1993\n\
  	The Regents of the University of California.  All rights reserved.\n");
  #endif /* not lint */
  
  #ifndef lint
  #if 0
  static char sccsid[] = "@(#)time.c	8.1 (Berkeley) 6/6/93";
  #endif
  __RCSID("$NetBSD: time.c,v 1.9 1997/10/20 03:28:21 lukem Exp $");
  #endif /* not lint */
  
  #include <sys/types.h>
  #include <sys/time.h>
  #include <sys/resource.h>
  #include <sys/wait.h>
  #include <signal.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <unistd.h>
  #include <errno.h>
  
  int lflag;
  int portableflag;
  
  int	main __P((int, char **));
  
  int
  main(argc, argv)
  	int argc;
  	char **argv;
  {
  	int pid;
  	int ch, status;
  	struct timeval before, after;
  	struct rusage ru;
  
  #ifdef __GNUC__		/* XXX: borken gcc */
  	(void)&argv;
  #endif
  	lflag = 0;
  	while ((ch = getopt(argc, argv, "lp")) != -1)
  		switch((char)ch) {
  		case 'p':
  			portableflag = 1;
  			break;
  		case 'l':
  			lflag = 1;
  			break;
  		case '?':
  		default:
  			fprintf(stderr, "usage: time [-lp] 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((errno == ENOENT) ? 127 : 126);
  		/* NOTREACHED */
  	}
  
  	/* parent */
  	(void)signal(SIGINT, SIG_IGN);
  	(void)signal(SIGQUIT, SIG_IGN);
  	while (wait3(&status, 0, &ru) != pid);
  	gettimeofday(&after, (struct timezone *)NULL);
  	if (!WIFEXITED(status))
  		fprintf(stderr, "Command terminated abnormally.\n");
  	timersub(&after, &before, &after);
  
  	if (portableflag) {
  		fprintf (stderr, "real %9ld.%02ld\n", 
  			(long)after.tv_sec, (long)after.tv_usec/10000);
  		fprintf (stderr, "user %9ld.%02ld\n",
  			(long)ru.ru_utime.tv_sec, (long)ru.ru_utime.tv_usec/10000);
  		fprintf (stderr, "sys  %9ld.%02ld\n",
  			(long)ru.ru_stime.tv_sec, (long)ru.ru_stime.tv_usec/10000);
  	} else {
  
  		fprintf(stderr, "%9ld.%02ld real ", 
  			(long)after.tv_sec, (long)after.tv_usec/10000);
  		fprintf(stderr, "%9ld.%02ld user ",
  			(long)ru.ru_utime.tv_sec, (long)ru.ru_utime.tv_usec/10000);
  		fprintf(stderr, "%9ld.%02ld sys\n",
  			(long)ru.ru_stime.tv_sec, (long)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", 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, "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 (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE);
  }
  