time/time.c

   1 /*      $NetBSD: time.c,v 1.9 1997/10/20 03:28:21 lukem Exp $   */
   2
   3 /*
   4  * Copyright (c) 1987, 1988, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the University of
  18  *      California, Berkeley and its contributors.
  19  * 4. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 #ifndef lint
  38 __COPYRIGHT("@(#) Copyright (c) 1987, 1988, 1993\n\
  39         The Regents of the University of California.  All rights reserved.\n");
  40 #endif /* not lint */
  41
  42 #ifndef lint
  43 #if 0
  44 static char sccsid[] = "@(#)time.c      8.1 (Berkeley) 6/6/93";
  45 #endif
  46 __RCSID("$NetBSD: time.c,v 1.9 1997/10/20 03:28:21 lukem Exp $");
  47 #endif /* not lint */
  48
  49 #include <sys/types.h>
  50 #include <sys/time.h>
  51 #include <sys/resource.h>
  52 #include <sys/wait.h>
  53 #include <signal.h>
  54 #include <stdio.h>
  55 #include <stdlib.h>
  56 #include <unistd.h>
  57 #include <errno.h>
  58
  59 int lflag;
  60 int portableflag;
  61
  62 int     main __P((int, char **));
  63
  64 int
  65 main(argc, argv)
  66         int argc;
  67         char **argv;
  68 {
  69         int pid;
  70         int ch, status;
  71         struct timeval before, after;
  72         struct rusage ru;
  73
  74 #ifdef __GNUC__         /* XXX: borken gcc */
  75         (void)&argv;
  76 #endif
  77         lflag = 0;
  78         while ((ch = getopt(argc, argv, "lp")) != -1)
  79                 switch((char)ch) {
  80                 case 'p':
  81                         portableflag = 1;
  82                         break;
  83                 case 'l':
  84                         lflag = 1;
  85                         break;
  86                 case '?':
  87                 default:
  88                         fprintf(stderr, "usage: time [-lp] command.\n");
  89                         exit(1);
  90                 }
  91
  92         if (!(argc -= optind))
  93                 exit(0);
  94         argv += optind;
  95
  96         gettimeofday(&before, (struct timezone *)NULL);
  97         switch(pid = vfork()) {
  98         case -1:                        /* error */
  99                 perror("time");
 100                 exit(1);
 101                 /* NOTREACHED */
 102         case 0:                         /* child */
 103                 execvp(*argv, argv);
 104                 perror(*argv);
 105                 _exit((errno == ENOENT) ? 127 : 126);
 106                 /* NOTREACHED */
 107         }
 108
 109         /* parent */
 110         (void)signal(SIGINT, SIG_IGN);
 111         (void)signal(SIGQUIT, SIG_IGN);
 112         while (wait3(&status, 0, &ru) != pid);
 113         gettimeofday(&after, (struct timezone *)NULL);
 114         if (!WIFEXITED(status))
 115                 fprintf(stderr, "Command terminated abnormally.\n");
 116         timersub(&after, &before, &after);
 117
 118         if (portableflag) {
 119                 fprintf (stderr, "real %9ld.%02ld\n",
 120                         (long)after.tv_sec, (long)after.tv_usec/10000);
 121                 fprintf (stderr, "user %9ld.%02ld\n",
 122                         (long)ru.ru_utime.tv_sec, (long)ru.ru_utime.tv_usec/10000);
 123                 fprintf (stderr, "sys  %9ld.%02ld\n",
 124                         (long)ru.ru_stime.tv_sec, (long)ru.ru_stime.tv_usec/10000);
 125         } else {
 126
 127                 fprintf(stderr, "%9ld.%02ld real ",
 128                         (long)after.tv_sec, (long)after.tv_usec/10000);
 129                 fprintf(stderr, "%9ld.%02ld user ",
 130                         (long)ru.ru_utime.tv_sec, (long)ru.ru_utime.tv_usec/10000);
 131                 fprintf(stderr, "%9ld.%02ld sys\n",
 132                         (long)ru.ru_stime.tv_sec, (long)ru.ru_stime.tv_usec/10000);
 133         }
 134
 135         if (lflag) {
 136                 int hz = 100;                   /* XXX */
 137                 long ticks;
 138
 139                 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) +
 140                      hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000;
 141
 142                 fprintf(stderr, "%10ld  %s\n",
 143                         ru.ru_maxrss, "maximum resident set size");
 144                 fprintf(stderr, "%10ld  %s\n", ticks ? ru.ru_ixrss / ticks : 0,
 145                         "average shared memory size");
 146                 fprintf(stderr, "%10ld  %s\n", ticks ? ru.ru_idrss / ticks : 0,
 147                         "average unshared data size");
 148                 fprintf(stderr, "%10ld  %s\n", ticks ? ru.ru_isrss / ticks : 0,
 149                         "average unshared stack size");
 150                 fprintf(stderr, "%10ld  %s\n",
 151                         ru.ru_minflt, "page reclaims");
 152                 fprintf(stderr, "%10ld  %s\n",
 153                         ru.ru_majflt, "page faults");
 154                 fprintf(stderr, "%10ld  %s\n",
 155                         ru.ru_nswap, "swaps");
 156                 fprintf(stderr, "%10ld  %s\n",
 157                         ru.ru_inblock, "block input operations");
 158                 fprintf(stderr, "%10ld  %s\n",
 159                         ru.ru_oublock, "block output operations");
 160                 fprintf(stderr, "%10ld  %s\n",
 161                         ru.ru_msgsnd, "messages sent");
 162                 fprintf(stderr, "%10ld  %s\n",
 163                         ru.ru_msgrcv, "messages received");
 164                 fprintf(stderr, "%10ld  %s\n",
 165                         ru.ru_nsignals, "signals received");
 166                 fprintf(stderr, "%10ld  %s\n",
 167                         ru.ru_nvcsw, "voluntary context switches");
 168                 fprintf(stderr, "%10ld  %s\n",
 169                         ru.ru_nivcsw, "involuntary context switches");
 170         }
 171
 172         exit (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE);
 173 }